Well today I finally got around to trying to fix my CX2 after a major crash - had a few parts give up the ghost as I think there was too much lateral movement on the bottom rotor & its pole (gears got all grinded). Replaced all the gears and the bottom rotor now runs like a dream. The top rotor seems to have a new issue now, where I will spin it up and the power is not equalised... i.e. I isolate power to the top rotor as if yawing, and the motor spins up appropriately, but the power doesn't seem to be transmitting through to the rotors. It's quite possible that I have somehow borked the chopper putting it back together, so could you guys give me a couple of hints as to what I should check to make sure all the bits and pieces are in order. It looks like the top rotor's gear might be starting to shred a bit too.

Rgds
Dan

check and see if the lock collar is secured to the shaft just below the drive gear, they sometimes come loos, it should screw down on a flat spot on the shaft