Same parameters won't work the same if we change the type of the elevons we use. So if we try a different model of elevon we will notice that the amplitude has change. The amplitude of the elevons in FBWA mode can be changed using this parameters:
If the plane doesn't fly because the elevons are different, don't worry, in these photos below you will see the amplitude of the wings the plane should have to fly properly without turbulence in FBWA mode. If your plane's wings amplitude is different try changing the parameteres I have mentioned until you get it.
Now we will see if the autopilot's stabilization works well. With this kind of control, the plane will try to fly always horizontal, so if the plane rolls left the control algorithm will move the left wing down and the right wing up to roll to the right and stabilize it. If the plane rolls right, the control will do the opposite. In the same way, if the plane goes up the control will move the wings down to stabilize it and to fly horizontal. For a good fly we should have those amplitudes when we roll and pitch the plane without moving the joysticks.
Those parameters are not the perfect ones, so maybe with other amplitudes and other PIDs the plane will fly better. If you optimize them please share your results with us and we will try them.