RE: Hughes 500E 700 size Electric
I think its just very noticeable on the 500. It has the HIgh dog house and the T tail makes even the slightest vibration stand out. I also had it on my Sea Hawk that used Trex 600 mechanics and UH1. I just put a streched Chaos in a Thunder Tiger A109. Once I had tyhe mechanic firmly mounted to the base I grasped the main shaft and sure enough the frames would flex. A couple of braces fore and aft of the main and the problem was eliminated.