Excessive Rudder Required For C206

I've been flying Carenado's C206 a lot lately, and it requires a ton of right rudder to keep it straight in level flight.

With the autopilot on, if nothing is done to correct it, the ball is completely offset on the turn and slip indicator. If sufficient rudder trim is put in to center the ball, the rudder itself is displaced by about 15-20 degrees.

I tried zeroing out both;

P_factor_on_yaw

Torque_on_roll

but neither one had any discernible effect.

Anyone else know what I can try?