For me the environment (the cave) itself dictates what I am going to be using.
I have a buddy that dives an Inspiration in Cow - that has to be interesting at times.
Cave is definitely a specialty and sub-group but more than anything rebreathers provide cave divers the one thing they don’t have on OC- Time.
Time to find the line.
Time to wait out some of the silting
Minimum percolation in the cave
Is there a reason people are trying to force themselves through these restrictions?
Take the tanks off and swim them through!
The rebreather with respect is a different story.
This is were I like the meg, the profile Rocks!
If I was diving a Inspiration I would tempted to take it out of the case and mount the scrubber and guts in a u-shaped piece of sheet steel and cover it with ballistic nylon. That way you protect the canister and cabling and mount it to a backplate and harness. I have seen back plates with slits on the sides (deep sea supply) to mount tanks. Or heck drill in mounting holes for tiger gear adapters. You should be able to seriously cut down the profile of the unit. (Clearly this is my opinion and probably has tons of flaws.)
Logistically compares to open circuit – no comparison.
Later, Andrew