Well, Thanx Mark; i'd prolly move too slow fer ya; but then try to make up for it once position is arrived to...
Sometimes it seems like an orchestration of events, that you draw together, this piec polished, this element sprinkled on etc. to add up to support. But when it comes together real right; handling something large like it was light; it kinda has a grace of it's own; your eye can tell, especially as the forces here are pitted against them own selves barely equating itself!
One of the key things to remember (i think); is that if a force can alter a rig, then the variable for that force is in every rig, even if generally zero. Whereby, if the support angle of the line back into the hinge is a operating element of this rig, it is something to be paid attention to in all rigs. Even if line angle doesn't pull into hinge pocket for longer hold, or away from hinge pocket for quicker tearoff, or just set neutrally with no line angle tension in or out of the hinge; it all has a place in the formulae of every rig, something to be considered before cutting.
Here, in this "Hinge Pocket Pressure Rig" (or by any other name...); this quanity of this angle is just tuned up to such a high quanity as to give full support in the formulae and event. The pressure in the pocket as a force is now inflated to the point where we can see it, magnified to full support of load! But even as the effect and force drop below the full support power, the angle pulling into hinge is still helping some to keep load supported. Just more other factors have to help to add up to the same quanity of support for the same work; in trade for backing off the pocket pressure. Just as if support line angle was pulling away from hinge, even slightly, hinge's support is reduced, and hinge will tear off sooner. The quanity has an effect, a place in all rigging considerations i would think.
Also, watch those closed systems DdRT, Mayhem, this etc. that things kinda get confusing compared to the 'open' systems; but going by these examples seem to offer more self containted mechanics, turned on itself to giving surprising force, better help (but i'm sure that can be turned around/ against us in some patterns).
Mr. Teti, not enough question, and too much avatar; for me to respond well!