Duncan Price once bubbled...
No disrespeact, but it seems an example of someone repeating what their instructor told them without questioning its veracity.
Mind how you go.
Duncan
No disrespect taken. No one ever said the number but me, especially not an instructor. I pulled it out of my arse. My basic point was that most cave diving is merely recreational. You are an exception to most rules.
Most people that I know would have died using a rebreather made from tampons, floor mats, pvc pipe, and a horse-collar. Due to this fact, I say that most people shouldn't dive a rebreather made out of said ingredients. You, however, are the exception. You are very educated and (seemingly) very intelligent.
Your methods are slightly less than what I would consider safe FOR ME! I don't have a doctorate in Chemistry and prefer using a wing for buoyancy. I don't have the technical experience to build a rebreather out of household items (yet).
We had a dive planned during your last visit, but alas, it did not work out.
You are an exception, not the rule.
Cheers