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people tend to dislike using yoke adapters with their DIN 1sts...is it really that bad? Is it worth putting up with the yoke adapter some of time (say half) to be able to use it without a yoke adapter the other half? Or would I be better off just getting a straight yoke 1st?
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For some people, the extra length of the yoke adapter can cause them to hit their head on the regulator. Most people don't have a problem. It's a combination of how high your tank sits on your body, the diameter of the cylinders you're using, and how straight your back and neck are. The adapter works OK for me but not for everyone.
On what do you base it being no problem for "most" people? I don't think we know how many are in each camp.
Anyway, it's such an individual issue, based on all the factors you mentioned, that a diver needs to try it for himself with his tank placed where he wants it, etc.
I found the yoke adapter for an Atomic regulator very uncomfortable. I like to change positions as I dive and the 1st stage was always hitting me in the back of the head, It is usable, but far from ideal.
The yoke adapter adds about a half inch to the reg to tank distance. I have never noticed a problem with my hog D1 regs.
Most tanks (but not all) have a convertible valve so you may be diving a DIN tank-in-hiding anyway,...
In previous threads on this topic someone mentioned that the converter plugs can be a pain on rental tanks because the threads are susceptible to corrosion if the plug is not removed and the tank and plug threads cleaned after saltwater use. Also, plugs can get misplaced--that is, separated from tanks. So some dive operators may shun them. Or you may find a difficult to remove plug and/or corroded DIN threads behind the plug. And of course this means someone--you or the dive op--must have a hex key (aka Allen wrench) handy. I know these convertible valves are becoming more common, but as a traveling diver I would hesitate to count on these being available and usable at all destinations. The diver who rents tanks in vacation destinations can always count on yoke.