RE: prop balencing?
Mike, when you and I started in this hobby, I think the thinking was that you balanced any prop, because they were made from wood which could have differant densities from one end to the other. I think your probably right, a 10 inch composite prop likely will not be out of balance enough to cause a problem. From my own personal point of view; however, it takes so little time to balance and I have a great balancer to check it with, I'm just going to go ahead and do it. I have not found a glaringly out of balance composite prop yet. However, almost all could be and were improved by adding more tip paint to the lighter tip.
I also shave off and sand the edges of all the composite props I buy. As they come, they are very sharp with flash and just handling them is dangerous, let alone attempting any hand starting.
I've seen guys flying with Master Airscrew props with the price tag and bar code label still stuck to them. What do you guys think of this?