Took out my top flight balance,started on my 18 c bell way out of balance,dremaled the heavy spots.have done similar before (just tires) takes lots of time (at less for me)so now I am balancing everything thing I can.gear box, every rotating mass ,. Need stronger mags to balance tires, Like I say may be I am a bit fanatical but for optimal performance I am sure this is the way to go, I do not think I am the first to do this?Do you think its worth while?