For now stay in manual mode and find the proper neutral for your output, then adjust PIDs, then adjust horizon.
Step1 : Fly the aircraft in manual mode and adjust the trims. Then back to the ground station, look at what is the actual output PWM values for yout 2 servos. This value should be defined as your neutral value. Once done, reset the trims on your radio.
Step 2 : Thats a wing so the actuation effort should be devided by two on the elevator compared to the aileron (roughly speaking), so reduce the P I and D rates of aileron and elevator as follows
- D = 0 on both axis
- P divided by 2 compared to what it currently is on the aileron axis
- P divided by 2 compared to what you've just put on aileron
- Do not remember I exactly for sure but if memory serves me right mlyle recommended half of P when he installed the sparky in his mini gobelin.
Check if you can still get enough defection on the servo with these reduced PID when in acro mode. If the servo barely moves, you've reduced P&I too much.
Step 3 : Try to enable acro mode in flight with these settings. If it more or less flies go to step 4, otherwise back to step 2...
Step 4 : enable txPID module and fine tune in flight the P gain.
Step 5 : enable attitude mode and if it flies more or less trim the aircraft for horizon and then back to the ground station, use the auto-trim feature which will "calibrate" horizon.
That's it more or less...