I use a DR-600 Widolf with no CO2 problems. It does have a small oro-nasal cup, so that helps. The only hard part is smearing enough anti-fog on to keep it clear, but a goo called 500PSI works well. I guess that makes me a Commie! Rob
__________________ "CC Rebreathers will become a viable part of tech diving WHEN PIGS FLY!!"--GI3 |