Hi Steve
You picked the right place to lern about CCR diving and find out if its for you. Most modles I have herd of are covered on here and severalc I havent herd of

Excelent level headed debait and discussion as well so take a good look through the archives and see if its been discussed before then fire away with new questions.
Enjoy
ATB
Mark Chase
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Is it supposed to make that noise ?
I took my unit to the dive shop and demanded they bolt on every thing that would fit.
Join my elite diving teem and get a Tshirt "Doing It Chasey"Hammerhead Eccr Advanced Diving System