Jorbar1551:Am i right to assume correctly that all true DIR and Tec divers use din valves on their tanks and 1 stages?
Most tech divers use DIN,but yoke was used for many years without problems. I think the most important thing is have one type of connection for all your regs and don't mix them up ie DIN for backgas and yoke for stage/deco. It would be a pity to have a failure on your yoke oxygen bottle,and only have DIN valves on the other regs.