Stu,
Great words, and verde provided

; should be required reading when one signs up at this fab site.
Only been here since my first Oriskany dive (where I wagered a rebreather and a scooter is probably the best way to dive the Great Carrier Reef) and have since found Rebreather World a great repository
TO RESEARCH info from folks who are actually have used/are using rebreathers.
Not everybody gets it, though. Stand by for the, "I'm too lazy to read anything about the xx or the xxx rebreathers, and have way too much disposable income, and was wondering if you experts could tell me which one would make me cool..." post
