Dive!Dive!

Hmmm
Like many people on here I had some very bad experiences of getting regs serviced in my early OC days - stuff coming back worse than when it went in etc.
I now do all my own regs. Check the IP regularly, and do a complete rebuild every 2 years unless I have a problem earlier. I have all Apeks and you can easily find the service instructions on the web. I would strongly reccomend a decent ultrasonic bath and some tools (Peter Built in the US do a whole range at resonable prices). It's not difficult if you take your time. For me, it was never about cost, more about knowing it was done right, and moreover, being able to service one at my convenience. Having done a few now, I'd be confident of doing one in the field as well if necessary. I dont see why any of the mechanical bits of a Rebreather should be any different - its all fairly basic stuff. The electronics / handsets are different of course (except cells) and i wouldnt touch those.
O2 cleaning. Get a copy of the Oxyhacker book - loads of really good common sense advice. I do all my own tanks - easy really - pay attention to the valves. I put my own stickers on - not claiming they have been done elsewhere, just that they have been done in accordance with industry standards (which they have), even if those standards are bizzare, being time based rather than taking any account of how many fills, of what quality etc. I do them once a year.

Steve