Here is what's going on with my rappy50:

I go to full RPM (1700) on the ground. When I get around 0 pitch or +2 the heli just starts shaking wildly, not the tail, the whole heli, like something would be really out of balance!

I take it off the ground and it is ROCK solid.

I set it back on the skids even just floating and it start shaking again! Not temporally, as long as I have it in this floating +2 pitch position.

The RPMS is always around 1700 (with the speed gov on)

Any suggestions?

Thanks