RE: prop balencing?
Don't get me wrong - balancing a prop is not a bad idea, and if you have a balancer and some spare time, have at it.
But a lot of newbies feel that they HAVE to balance the prop before they can fly because the instructions said to do it.
All I'm saying is, you don't. The plane is going to fly just fine. It's not going to shake itself to pieces, or anything else.
So like I said, if you have a balancer, go ahead. If you don't, don't worry about it (Again, especially on a 10" prop)
I don't even THINK of balancing anything under 18" unless I have made a drastic change in the prop (like trimming the ends off)