Balance all of your props. It means a great deal to your airframe and particularly your radio. This is a routine that all racing and pattern dudes do as a matter of course.

The better balancers are the Gordberg Magnetic types. The Dubro with the two large steel wheels works well when new but is just okay after the wheels oxidize. Polish the wheels every few months especially in humid climates

Radical RC carries a small finger balancer with threaded anodized ally end cones (about 3 bucks) that really works great on the Magnetic balancer. Steel cones would actually work better on the Mag balancer but the rod is magnetic and is adequate.

The Goldberg Mag unit is less expensive (around 20$) than the Dubro (around 30$), even if you purchased the Radical RC goodie to suspend the props with.

The downside of the Mag balancer is prop weight...it can only tolerate 100 grams or less. Many woodies weigh less than 100 grams up to around 19" diameter. APC's are heavy so this balancer will not accomodate APC's larger than 15-16".