rEvo MOD1 with Zerogravity diving

pieater · 13th March 2008, 07:42

I never really thought a CCR would be for me, mainly because I was worried about the complexity, the risks and the cost. I have been fortunate enough to be able to discount the latter issue; realised the second will always need to be respected and so decided to look closely at the CCR market. I tackled issue 1 by looking for mCCR's that looked like being some of the toughest units out there.

There were basically three options:
Classic Kiss
rEvo 2
Copis Meg

I didn't fancy the Meg due to the over-the-shoulder counter lungs and associated clutter. The Kiss and the rEvo remained. I chose the rEvo because of the scrubber design and the low profile.

As mCCR's are not capable of achieving the CE standard, that means that they can't be sold within the EU. Therefore, I had to look abroad for training.

These two ugly feckers came highly recommended:
Zero Gravity Diving - Home and so communications commenced with Dave Cooper being available for as many telephone and email conversations as I needed to come to my own conclusions, based on the sage words of Dave along with my own research.

The dates were in the diary and the money lashed out just after Christmas, and that's when the doubts set in: would I be able to do it? What would I be put through? What if I hated it?

Well, the day dawned soon enough and I was off to Geneva. Despite Dave's generous offer of the use of Phil's floor, I decided to go to a hotel. Unfortunately my trip clashed with the Geneva motor show, so most hotels were full. I had to find one in the middle of Geneva which meant that I had a 30 minute each-way journey every day in a hire car: an Auto Corsa that went like a fart in a bottle.

I arrived the evening before the course proper and as I arrived, Dave was explaining to someone that, "no - it doesn't matter if you've bought a Boris, I can't teach you MOD 1 if you're medically unfit". Repeatedly. At increasing volume. This I found strangely comforting, as I could immediately see that Dave took his responsibilities very seriously indeed. Later I was introduced to my rEvo, which the guys had thoughtfully assembled for me. Phil gave me a "tour" of the unit and I was reassured by the build quality, the design features, the finish and the simplicity of the operation; everything I wanted in fact!

I was also introduced to Fred, the other student; and Julien the impossibly young technical divemaster, whose job it would be to video our efforts on days 1, 2 and 3 and lead the dives on day 4 . Fred turned out to be an Austrian living in France who did a lot of Trimix diving out of Marseille. That meant that I was by far the least experienced person there - which concerned me somewhat. It also meant that on the course there were 2 students (they only ever accept a maximum of 3 at a time) to 1 Instructor Trainer (Dave), 1 Instructor (Phil) and Julien - again, very comforting ratios.

Phil's got a few bailout's available:

And "a bit" of sofnolime:

Fred getting some guidance from Phil (left) on "something"

Units getting prepped:

Day 1
I arrived at Phil's garage (training nerve centre) and was taken through the unit's operation in impressive detail. We packed the scrubbers, analysed the gas, calibrated the O2 cells and packed the cars.

We arrived at dive site 1 (St Prex) shortly afterwards. After site orientation we kitted up, did pos/neg tests, O2 flushed it and started the prebreathe. The "taste" of the new unit in the loop was enough to make me gag - in a big way. All chemical and rubber, it felt caustic on my lungs and the doubts about seeing it through returned. The guys slowed the pace for me, made soothing comments and I calmed down enough to get in the water. Phil's prophecy of "it'll be better when you're underwater" was totally accurate.

To the total novice (me), the first time you submerge on CCR is a very odd thing. For a start, no matter how often you hear someone say that breathing out won't help, you still find yourself trying it out of habit anyway. The second thing is that things are very quiet apart from the flip / flap of your own mushroom / one-way valves. We knelt on the bottom in 4M of water and did drills for 2 hours. This was complicated by the fact that my suit was leaking slightly and it was bloody cold. F*()&*(^&* freezing in fact. The rEvo works by using a constant bleed of O2 into the loop which you top up as necessary with a manual injection button underneath the unit. Now, at 4M, our old friend Dalton and his bloody law means that maintaining a PPO2 over 1.2 is hard. Very sodding hard. Also, kneeling in the water gives the worst Work of Breathing positioning possible. So, there was some graft involved. It was so cold that Fred couldn't feel the manual inject button despite having his finger on it. I was not shivering. I was shaking. We were both happy when we left the water for a defrost.

Dave and Phil then mentioned their new Golem Gear heated vests. The w4nkers

Then it was back to the batcave (Phil's garage) to strip the units and prepare them for the next day.

St. Prex dive site:

Day 2
Back at St Prex we went through the tougher drills from the day before and some new stuff like no-mask swims along a line; breath-hold swims and then we went for a swim.

This, for me, proved to be a bloody disaster. Bouyancy was a joke, PPO2 control was sodding awful and trim was just a long-forgotten memory. We got to 20M before returning. Vis was at least 10M unless you looked behind me but the temperature felt better - probably as we were swimming around enough to warm ourselves up. We got out and I was gutted. I'm no trim-god on OC but my performance on this dive had been shit. However, Dave and Phil didn't really see it that way and described this process as normal. I felt slightly better as we headed back, but beat myself up pretty badly when the video was on.

On OC, I use my wing for bouyancy control, just putting enough in the suit to avoid having my knackers crushed. Dave wanted us to use our suits for bouyancy and that new concept didn't help with my overall task loading. Also, trying to necklace your bailout reg gets a ball ache in the stage on / off drills so I adopted what everyone else was doing and used a boltsnap on a line around my neck to hang the reg from. Also, running the suit inflate from the bailout led to a birds nest of hoses in front of me that will take some time to resolve.

The video proved very useful as Dave pronounced me overweighted, dropped 2Kg altogether (total now 8) and moved 4Kg of it to the top of the unit. Cable ties are wonderful things. Fred was much, much better, yet Dave dropped 2Kg off him and moved 3Kg to the top.

Day 3
Usual preparations and we were off to Hermance dive site along with most Swiss divers it seemed. The units got a fair bit of attention, most of it in a language I couldn't understand

Phil thought he'd forgotten his hood and set off in the car to a sports shop. that gave me enough time to ask Dave if I'd heard Phil right when he said we'd go to 35M, spike our PPO2 to about 3, bail out and vent the units while doing a dil flush, before going back on the loop. On my third day on CCR? hmm. at 35M? hhhhmmmmmmmmmm. Dave confirmed that we were doing exactly that - before going SCR running on the ADV alone for a quick circuit of a small wreck. ooooooooooooohhhhhhhh shit.

It actually went well. So well in fact that Phil gave me a "wanky PADI handshake" afterwards.

Trim was much, much better - as was PPO2 and bouyancy control.

On ascent, we paused at 20M to deploy DSMB's and do simulated deco stops on our way to the surface. This went well for all of us.

The "boot full of loot":

Day 4
Dive site was at Rivaz and involved kitting up in a railway station. Getting down to your underpants in front of the passengers on the 11.15 to Lausanne was "interesting".

For this dive, Phil and Dave clipped our rEvodreams behind our backs and made us fly the units on the HUDs. The dive was to 40M, along a cliff, the underwater topography reminding me very much of Wastwater. Dave was running a very hypoxic diluent, so we just did his stops as simulated deco for us on the way up.

Again this went well. In the 20 - 25 minutes we spent swimming at 40M, I can confirm that I didn't need to add any O2 to my loop at all, the constant flow orifice being bang-on the money. This was a great dive and I felt I was starting to get to grips with the unit and the concepts required.

We surfaced and Dave and Phil announced that we'd passed our course and that Phil had completed his instructor qualification as well!

From Dive 1 I'd been telling Fred that I'd been seeing lots of crayfish on the dives. Fred obviously needs to eat more carrots as he didn't see any. As we surfaced at the end of our few days course, I plucked one of the crustaceans from the lake bed and waved it in front of his mask. He saw one at least!

The dive site:

So that was it, 8 dives, 8 hours in the water; as Dave said in the post-course de-brief, I now have a license to crawl. Walking comes much, much later.

Overall, I cannot fault the quality of instruction or the quality of the service provided. In a world where we're told to pick the instructor carefully, I would have no hesitation in recommending Zero Gravity. Get in there, you know you want too!

Papa Smurf Dave:

bigfeller · 13th March 2008, 08:45

Excellent report - thanks for the write up!

schnappi · 13th March 2008, 09:23

Quote: (Originally Posted by pieater)

Overall, I cannot fault the quality of instruction or the quality of the service provided. In a world where we're told to pick the instructor carefully, I would have no hesitation in recommending Zero Gravity. Get in there, you know you want too!

totally agree with you. i made the mod 1 ccr on my inspiration about a year ago with dave and phil and i also had a very good feeling there. i will do all other training i have planned with zero gravity. sure its no fun driving to coppet from zurich, but in the end its worth it...

cheers
--bruno

TMVA · 13th March 2008, 10:41

Quote: (Originally Posted by pieater)

Overall, I cannot fault the quality of instruction or the quality of the service provided. In a world where we're told to pick the instructor carefully, I would have no hesitation in recommending Zero Gravity. Get in there, you know you want too!

Well said.
Did my Mod 1 there in Now. 2007, and loved it.
I recon it was the exact same spots we dived.
Cool people, Dave, Phil and Julien. Hope to do some more training with them.
Best
Thorsten.

**Bobmac** · 13th March 2008, 11:28

Sounds like you had a great time and learned a lot. Thanks for the write-up.

CharlieT · 13th March 2008, 14:38

Congratulations!

Dave is a very thorough instructor so you have the comfort of starting rebreather diving with a 1st class course.

Charlie

fred-plouf · 13th March 2008, 22:07

Hi Martin,

Very nice report, have a good time this 4 days. See you perhaps in France next time, then we speak french

.

Fred.

michael · 14th March 2008, 11:42

First of all, congratulations with your MOD1 course!
In which association did you take your course?

I'm asking this because you are writing about a training senarior, when you are on 35 meters with PO2 3,0. I've never heard about this senarior in a training situation. Isn't that a bit high?
I know it's for a short period of time, that you are on this high PO2, but why take the chance.

I'm not asking this to gun you down, i'm just trying to understand.

All Regards
Michael Bering

pieater · 14th March 2008, 12:52

Quote: (Originally Posted by michael)

Isn't that a bit high?

It's not a bit high, it's very very very high. That's why we bailed out, turned off the O2 and brought the PO2 back down with the dil flushes and loop venting. It's to simulate a problem whereby the O2 addition system gets jammed open.

***Decodiver*** · 14th March 2008, 15:42

Quote: (Originally Posted by michael)

First of all, congratulations with your MOD1 course!
In which association did you take your course?

I'm asking this because you are writing about a training senarior, when you are on 35 meters with PO2 3,0. I've never heard about this senarior in a training situation. Isn't that a bit high?
I know it's for a short period of time, that you are on this high PO2, but why take the chance.

I'm not asking this to gun you down, i'm just trying to understand.

All Regards
Michael Bering

Michael,

Nobody is breathing 3.0 bar they come straight off the loop.

It is what can happen if an orifice or a solenoid fails open, in a matter of seconds you have 100% O2 in your loop at 35 metres.

Better you've done it and know you can handle it than sh1t your pants sometime in the future and freak out.

So instead of talking about it in a lecture, I get the students to experience the same thing, under my supervision, and at least another instructor and or divemaster. They do not breathe the loop, they bailout and then bring the loop down to a breathable PPO2 before bailing back in.

Oh and by the way, it is demonstrated by the instructor to all the students at the same depth, before they do it, infact we demonstrate all the skills.

Cheers,

Dave Cooper.

13th March 2008, 07:42	#1 (permalink)
pieater New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Oct 2006 Posts: 53	rEvo MOD1 with Zerogravity diving I never really thought a CCR would be for me, mainly because I was worried about the complexity, the risks and the cost. I have been fortunate enough to be able to discount the latter issue; realised the second will always need to be respected and so decided to look closely at the CCR market. I tackled issue 1 by looking for mCCR's that looked like being some of the toughest units out there. There were basically three options: Classic Kiss rEvo 2 Copis Meg I didn't fancy the Meg due to the over-the-shoulder counter lungs and associated clutter. The Kiss and the rEvo remained. I chose the rEvo because of the scrubber design and the low profile. As mCCR's are not capable of achieving the CE standard, that means that they can't be sold within the EU. Therefore, I had to look abroad for training. These two ugly feckers came highly recommended: Zero Gravity Diving - Home and so communications commenced with Dave Cooper being available for as many telephone and email conversations as I needed to come to my own conclusions, based on the sage words of Dave along with my own research. The dates were in the diary and the money lashed out just after Christmas, and that's when the doubts set in: would I be able to do it? What would I be put through? What if I hated it? Well, the day dawned soon enough and I was off to Geneva. Despite Dave's generous offer of the use of Phil's floor, I decided to go to a hotel. Unfortunately my trip clashed with the Geneva motor show, so most hotels were full. I had to find one in the middle of Geneva which meant that I had a 30 minute each-way journey every day in a hire car: an Auto Corsa that went like a fart in a bottle. I arrived the evening before the course proper and as I arrived, Dave was explaining to someone that, "no - it doesn't matter if you've bought a Boris, I can't teach you MOD 1 if you're medically unfit". Repeatedly. At increasing volume. This I found strangely comforting, as I could immediately see that Dave took his responsibilities very seriously indeed. Later I was introduced to my rEvo, which the guys had thoughtfully assembled for me. Phil gave me a "tour" of the unit and I was reassured by the build quality, the design features, the finish and the simplicity of the operation; everything I wanted in fact! I was also introduced to Fred, the other student; and Julien the impossibly young technical divemaster, whose job it would be to video our efforts on days 1, 2 and 3 and lead the dives on day 4 . Fred turned out to be an Austrian living in France who did a lot of Trimix diving out of Marseille. That meant that I was by far the least experienced person there - which concerned me somewhat. It also meant that on the course there were 2 students (they only ever accept a maximum of 3 at a time) to 1 Instructor Trainer (Dave), 1 Instructor (Phil) and Julien - again, very comforting ratios. Phil's got a few bailout's available: And "a bit" of sofnolime: Fred getting some guidance from Phil (left) on "something" Units getting prepped: Day 1 I arrived at Phil's garage (training nerve centre) and was taken through the unit's operation in impressive detail. We packed the scrubbers, analysed the gas, calibrated the O2 cells and packed the cars. We arrived at dive site 1 (St Prex) shortly afterwards. After site orientation we kitted up, did pos/neg tests, O2 flushed it and started the prebreathe. The "taste" of the new unit in the loop was enough to make me gag - in a big way. All chemical and rubber, it felt caustic on my lungs and the doubts about seeing it through returned. The guys slowed the pace for me, made soothing comments and I calmed down enough to get in the water. Phil's prophecy of "it'll be better when you're underwater" was totally accurate. To the total novice (me), the first time you submerge on CCR is a very odd thing. For a start, no matter how often you hear someone say that breathing out won't help, you still find yourself trying it out of habit anyway. The second thing is that things are very quiet apart from the flip / flap of your own mushroom / one-way valves. We knelt on the bottom in 4M of water and did drills for 2 hours. This was complicated by the fact that my suit was leaking slightly and it was bloody cold. F()&(^&* freezing in fact. The rEvo works by using a constant bleed of O2 into the loop which you top up as necessary with a manual injection button underneath the unit. Now, at 4M, our old friend Dalton and his bloody law means that maintaining a PPO2 over 1.2 is hard. Very sodding hard. Also, kneeling in the water gives the worst Work of Breathing positioning possible. So, there was some graft involved. It was so cold that Fred couldn't feel the manual inject button despite having his finger on it. I was not shivering. I was shaking. We were both happy when we left the water for a defrost. Dave and Phil then mentioned their new Golem Gear heated vests. The w4nkers Then it was back to the batcave (Phil's garage) to strip the units and prepare them for the next day. St. Prex dive site: Day 2 Back at St Prex we went through the tougher drills from the day before and some new stuff like no-mask swims along a line; breath-hold swims and then we went for a swim. This, for me, proved to be a bloody disaster. Bouyancy was a joke, PPO2 control was sodding awful and trim was just a long-forgotten memory. We got to 20M before returning. Vis was at least 10M unless you looked behind me but the temperature felt better - probably as we were swimming around enough to warm ourselves up. We got out and I was gutted. I'm no trim-god on OC but my performance on this dive had been shit. However, Dave and Phil didn't really see it that way and described this process as normal. I felt slightly better as we headed back, but beat myself up pretty badly when the video was on. On OC, I use my wing for bouyancy control, just putting enough in the suit to avoid having my knackers crushed. Dave wanted us to use our suits for bouyancy and that new concept didn't help with my overall task loading. Also, trying to necklace your bailout reg gets a ball ache in the stage on / off drills so I adopted what everyone else was doing and used a boltsnap on a line around my neck to hang the reg from. Also, running the suit inflate from the bailout led to a birds nest of hoses in front of me that will take some time to resolve. The video proved very useful as Dave pronounced me overweighted, dropped 2Kg altogether (total now 8) and moved 4Kg of it to the top of the unit. Cable ties are wonderful things. Fred was much, much better, yet Dave dropped 2Kg off him and moved 3Kg to the top. Day 3 Usual preparations and we were off to Hermance dive site along with most Swiss divers it seemed. The units got a fair bit of attention, most of it in a language I couldn't understand Phil thought he'd forgotten his hood and set off in the car to a sports shop. that gave me enough time to ask Dave if I'd heard Phil right when he said we'd go to 35M, spike our PPO2 to about 3, bail out and vent the units while doing a dil flush, before going back on the loop. On my third day on CCR? hmm. at 35M? hhhhmmmmmmmmmm. Dave confirmed that we were doing exactly that - before going SCR running on the ADV alone for a quick circuit of a small wreck. ooooooooooooohhhhhhhh shit. It actually went well. So well in fact that Phil gave me a "wanky PADI handshake" afterwards. Trim was much, much better - as was PPO2 and bouyancy control. On ascent, we paused at 20M to deploy DSMB's and do simulated deco stops on our way to the surface. This went well for all of us. The "boot full of loot": Day 4 Dive site was at Rivaz and involved kitting up in a railway station. Getting down to your underpants in front of the passengers on the 11.15 to Lausanne was "interesting". For this dive, Phil and Dave clipped our rEvodreams behind our backs and made us fly the units on the HUDs. The dive was to 40M, along a cliff, the underwater topography reminding me very much of Wastwater. Dave was running a very hypoxic diluent, so we just did his stops as simulated deco for us on the way up. Again this went well. In the 20 - 25 minutes we spent swimming at 40M, I can confirm that I didn't need to add any O2 to my loop at all, the constant flow orifice being bang-on the money. This was a great dive and I felt I was starting to get to grips with the unit and the concepts required. We surfaced and Dave and Phil announced that we'd passed our course and that Phil had completed his instructor qualification as well! From Dive 1 I'd been telling Fred that I'd been seeing lots of crayfish on the dives. Fred obviously needs to eat more carrots as he didn't see any. As we surfaced at the end of our few days course, I plucked one of the crustaceans from the lake bed and waved it in front of his mask. He saw one at least! The dive site: So that was it, 8 dives, 8 hours in the water; as Dave said in the post-course de-brief, I now have a license to crawl. Walking comes much, much later. Overall, I cannot fault the quality of instruction or the quality of the service provided. In a world where we're told to pick the instructor carefully, I would have no hesitation in recommending Zero Gravity. Get in there, you know you want too! Papa Smurf Dave: Last edited by pieater : 13th March 2008 at 10:32. Reason: clarification
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13th March 2008, 08:45	#2 (permalink)
bigfeller Clearing debt to buy a Rebreather Current Rebreather/s: Not Bought Yet Other Rebreather/s: Not Bought Yet Join Date: May 2005 Location: Ireland Posts: 12	Re: rEvo MOD1 with Zerogravity diving Excellent report - thanks for the write up!
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13th March 2008, 09:23	#3 (permalink)
schnappi New Member Current Rebreather/s: Inspiration Vision Other CCR Other Rebreather/s: Inspiration Vision Other CCR Join Date: Jan 2007 Location: Zurich, Switzerland Posts: 33	Re: rEvo MOD1 with Zerogravity diving Quote: (Originally Posted by pieater) Overall, I cannot fault the quality of instruction or the quality of the service provided. In a world where we're told to pick the instructor carefully, I would have no hesitation in recommending Zero Gravity. Get in there, you know you want too! totally agree with you. i made the mod 1 ccr on my inspiration about a year ago with dave and phil and i also had a very good feeling there. i will do all other training i have planned with zero gravity. sure its no fun driving to coppet from zurich, but in the end its worth it... cheers --bruno __________________ Sources shall be open, loops be closed
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13th March 2008, 10:41	#4 (permalink)
TMVA New Member Current Rebreather/s: rEvo Other CCR Other Rebreather/s: rEvo Other CCR Join Date: Mar 2007 Location: Denmark Posts: 29	Re: rEvo MOD1 with Zerogravity diving Quote: (Originally Posted by pieater) Overall, I cannot fault the quality of instruction or the quality of the service provided. In a world where we're told to pick the instructor carefully, I would have no hesitation in recommending Zero Gravity. Get in there, you know you want too! Well said. Did my Mod 1 there in Now. 2007, and loved it. I recon it was the exact same spots we dived. Cool people, Dave, Phil and Julien. Hope to do some more training with them. Best Thorsten.
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13th March 2008, 11:28	#5 (permalink)
Bobmac I'm working on it! Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: May 2005 Location: New Jersey Posts: 99	Re: rEvo MOD1 with Zerogravity diving Sounds like you had a great time and learned a lot. Thanks for the write-up.
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13th March 2008, 14:38	#6 (permalink)
CharlieT Custom Title Allowed! Current Rebreather/s: Inspiration Vision Other Rebreather/s: Join Date: Nov 2005 Location: London Posts: 449	Re: rEvo MOD1 with Zerogravity diving Congratulations! Dave is a very thorough instructor so you have the comfort of starting rebreather diving with a 1st class course. Charlie
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13th March 2008, 22:07	#7 (permalink)
fred-plouf New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Mar 2008 Location: France (Fos-sur-Mer) Posts: 16	Re: rEvo MOD1 with Zerogravity diving Hi Martin, Very nice report, have a good time this 4 days. See you perhaps in France next time, then we speak french . Fred.
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14th March 2008, 11:42	#8 (permalink)
michael New Member Current Rebreather/s: Megalodon Other Rebreather/s: Join Date: Nov 2005 Location: Denmark Posts: 49	Re: rEvo MOD1 with Zerogravity diving First of all, congratulations with your MOD1 course! In which association did you take your course? I'm asking this because you are writing about a training senarior, when you are on 35 meters with PO2 3,0. I've never heard about this senarior in a training situation. Isn't that a bit high? I know it's for a short period of time, that you are on this high PO2, but why take the chance. I'm not asking this to gun you down, i'm just trying to understand. All Regards Michael Bering
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14th March 2008, 12:52	#9 (permalink)
pieater New Member Current Rebreather/s: rEvo Other Rebreather/s: rEvo Join Date: Oct 2006 Posts: 53	Re: rEvo MOD1 with Zerogravity diving Quote: (Originally Posted by michael) Isn't that a bit high? It's not a bit high, it's very very very high. That's why we bailed out, turned off the O2 and brought the PO2 back down with the dil flushes and loop venting. It's to simulate a problem whereby the O2 addition system gets jammed open.
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14th March 2008, 15:42	#10 (permalink)
*Decodiver* Administrator Current Rebreather/s: Other CCR Other Rebreather/s: Other CCR Join Date: Jan 2005 Location: Geneva Posts: 2,181	Re: rEvo MOD1 with Zerogravity diving Quote: (Originally Posted by michael) First of all, congratulations with your MOD1 course! In which association did you take your course? I'm asking this because you are writing about a training senarior, when you are on 35 meters with PO2 3,0. I've never heard about this senarior in a training situation. Isn't that a bit high? I know it's for a short period of time, that you are on this high PO2, but why take the chance. I'm not asking this to gun you down, i'm just trying to understand. All Regards Michael Bering Michael, Nobody is breathing 3.0 bar they come straight off the loop. It is what can happen if an orifice or a solenoid fails open, in a matter of seconds you have 100% O2 in your loop at 35 metres. Better you've done it and know you can handle it than sh1t your pants sometime in the future and freak out. So instead of talking about it in a lecture, I get the students to experience the same thing, under my supervision, and at least another instructor and or divemaster. They do not breathe the loop, they bailout and then bring the loop down to a breathable PPO2 before bailing back in. Oh and by the way, it is demonstrated by the instructor to all the students at the same depth, before they do it, infact we demonstrate all the skills. Cheers, Dave Cooper. __________________ CCR/OC Trimix Instructor Trainer CCR Training to Mixed Gas in Switzerland, France, UK & Germany on Megalodon/COPIS-Megalodon/KISS/Sport KISS/Ouroboros/rEvo/Inspiration/Evolution/Sentinel www.zerogravitydiving.com Rebreather World Terms & Conditions Last edited by Decodiver : 16th March 2008 at 15:47.
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