I started using Rob Richardson's superb single and 2-seat Cougars and found that (in P3D4.5) at idle, parking brake on or off, the single seater slowly rotates at about where the right MLG contacts the ground. Looking over the aircraft.cfg file I see nothing out of sorts. I am not in SLEW mode but it sure seems like it - otherwise the performance etc. is normal.

The 2- seater works just fine.

Any ideas??????