My apologies to JJ, I somehow missed that simple solution when reading various forum threads. It would work great for the homeowner (where only 1-3 people use the machinery), provided that the adapter can indeed be connected with little force, to relieve the pressure. (I like this idea more than a 'pressure relief screw fitting'.)
I.e. my wife could use this home-made adapter that is kept on the tractor, relieve the pressure in the implement and/or tractor, and then make the QD connection between tractor and implement.
Heck, I would even ask Power-Trac to make me one and throw it in when taking delivery of a new machine...
Thanks for the feedback,