as a person getting into tec diving, i have found 2 ways to go. 1, the DIR way and 2 as DIR puts it the dangerous way. I have talked to some people high up in DIR and have been told that your gear configuation has to be one way only. you need a manifold that uses a static oring system(halcyon) and not a compressed oring system(OMS). I am a person who looks at things from all angles to deside the best way to go. When i heard that about the manifolds i asked if DIR had any reports showing the failure rate of any of the systems that are "dangerous". Thats the last i heard from them. My question is.. has anyone heard of any reports backing up what DIR says?? The way i look at it is.. if using a compressed oring system is bad, then DIR should not allow DIN style fittings since they also use a compressed oring and that oring is more likely to blow out then the oring in the manifold.