DA Aquamaster:Regs made by most companies are offerred in both DIN and yoke models, they are just not always stocked or cataloged that way. And you can't blame the company or the LDS as yoke connections are much more common and are still more or less the standard in North American recreational diving as well as in most of the dive destinations in this hemisphere. If you dive the carribean, a DIN reg will usually result in you having to tolerate a DIN to yoke adapter.
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The only real downside to a DIN valve in my opinon (other than limited travel availability) is that they hold water much more readily that a yoke valve and offer greater potential for water dropplets to be introduced into the tank during a fill so somewhat greater care is required in the filling process.
Wow. As always, great post! I almost always learn something from your posts. Thanks for sharing your insights.