Chopper: Not to beat a dead horse (and I still plan to report back on my experiment), but your remarks sound a little condescending. Gravity is also a "force." Gravity is the force acting upon the baldes when they are static, while centrixxxxal is the force acting upon the baldes while in motion.

You make a fundamentally incorrect assumption: that the mass of baldes balancing on a see saw are the same. As my earlier post points out, this will not be the case if the CGs of the blades on the see saw are different. That's why it is at least plausible that CG matching may not be necessary if the blades balance statically on the see saw.

Finally, if your contention is correct, I would expect single bladed racing props to nearly rattle the plane to pieces as they are accelerating/decelerating to their working RPM. I would also expect them to be extremely dangerous because if you have some kind of engine problem that results in a different RPM than expected, the aircraft would nearly come apart from vibration. In short, I kind of doubt that single bladed props would be viable if what you are saying is true.