"I don't understand why my multiwiis sucesses without ANY anti-vibration systems on frame, but my APM2.0 still sucks with foam and all things mentionned above... Same MPU, so is the code making us using these (stupid) setup with foam we dont know…"
Just to compare, what are your PID (accro) settings to fit the NTM 750kv with 11x4,7 ?
Are you using 3S or 4S lipos ?
I always got too much P or too less, can't figure a good compromise :/"