I have 2 with microheli heads.

It's not the heads, it's the flybar; You need to check that it moves VERY FREELY. Sometimes it binds a little in the microheli upperhead. Do what's necessary to fix the bind to get the flybar bouncing again, and problem solved; I guarantee it.

Also, check upper blade tracking and adjust; Very important.

Microhelis aluminum is a bit lighter than e-flites goodies.


p.s. STAY AWAY FROM MICROHELIS GRIPS; POS ! !