1st of all, Thanks to all the people that participate and improve the Ardupilot project.
I have tried all the code posted since 2.0 and in all the versions I try, I found that when in mode MANUAL the servos movement are fluid and continuous following the movement of the sticks in the radio.
But when I select the Stabilize mode, the movement of the servos due to the input of the arduimu (or the IR sensor) is fluid and smooth, but if I input some command using the Tx sticks, then the servos movement become coarse and jumpy and sometimes doesn't reflect the stick position.
This is true also for channer3 (motor) and I already change the wire from pin 13 to pin 11 (and change also the pin# in the code)
Did this happen also with your setups, jerky movements of the servos following your inputs in the Rc Tx but smooth movement following arduimu/ir sensor corrections??
How this reflects when the model is in the air flying?