No, the doubles plate is only universal because all of y'all copy each other like the Snickers episode , it is a double tank plate adapted to use with single tanks. A purpose made singles plate is lower profile, much more compact, never needs an STA and positions the tank much closer to the body and center of buoyancy and CG are therefore closer. And reaching the valve, despite having the tank further down the body, is still easy because the tank and valve are much closer to the diver.Umm, is the plate universal? And just a couple of manufacturers make a tall and/or short plate?
Afair, the whole point of the palte is that is universal.
One thing causes another, the cylinder being positioned so high and far from the diver thus forces the cylinder to also be mounted high behind the head so as to still be able to reasonably reach the valve. It works but it is not optimal, at least not for me or my wife or many others.
The "M" shaped plates I have seen time to time do appear to be truly universal if not optimal for either. But the standard plate, no, not really.