Thanks for the quick response! Yes, it is similar to the CX2 (4 channels -FP). I tried already adjusting the proportional but that fixes rotation. In my case, there is no rotation. The Heli is always pointing north and it moves N-NE-E-SE-S-SW-W-NW-N.....but always pointin its nose to the north...
Any more ideas? thanks for your help!