Some Folks (including myself) balance props, spinners and backplates on
all their planes. If vibration can be kept to a minimum, it helps in other
areas as well....including fuel foaming, and radio problems. Here's how to
do it with a regular balancing stand.

[link=http://www.rcuniverse.com/forum/m_1115188/anchors_1115188/mpage_1/key_/anchor/tm.htm#1115188]click here[/link]

FBD.