Not sure what you mean when you say 10/2 o'clock, or exactly what you mean by taking your reference at the 12 o'clock position. When you say dynamic balancing, my analytic personality wants to think of somehow balancing the prop while it's on a moving engine?? I tend to think of what you are describing as static balancing. Be that as it may, it's really difficult to get it 100% right anyway. Some guys set the heavy side of the prop opposite the piston on a single cylinder engine. A perfectly balanced prop on a single cylinder engine seems a bit contradictory, althought that is what we do and for the most part it works out. Your thinking is correct on the way the prop should act on the balancer. It should not fall off either way no matter where it starts. Some props are just impossible to get where you want them. Even a spinner will booger up the works some times.
APC's are usually pretty good, but on the heavy side. Good flywheel effect on the engine though. Take care_Bob