Hi guys. I'm almost hesitant to post this, but I can't figure this out.About 45% of the times I initiate a TO roll, the plane deviates to either left or right of the centerline without reason, or at least no reason I can determine. That's why I decided to ask for imput. I have checked that:-There is absolutelly no input (keyboard, joystick, mouse, or whatever)-There is no wind affecting me- My rudder trim is centered-There is no autopilot input trying to control the plane.On the last point, sometimes I even leave the A/P on, with HDG for the runway heading, sometimes I don't.Seems to happen at random.Any ideas?Thanks!Armando Arjona R.