I feel that hobbsy is right on........ but....... I can "feel" the keyboards clicking out there. There are many guys, (as discussed in other threads), that say balancing is a waste of time.
A lot have said... "a waste of time on smaller props".. like under 16". I just can't understand the reasoning in that statement. I am not an engineer, but, I just feel better when that prop is balanced, (any size)!! I mount mine horizontal too. .......lownslo...

Bob