Chimbu, surely the offset thrust line would be aimed to minimise the torque at a particular power setting - cruise for best economy? By reducing the amount of rudder/aileron trim at that setting? At takeoff and climb, I expect that torque would still need to be trimmed out for pilot comfort at least, and that at idle the trim would have to go in the opposite sense. I am just curious how these single engine turboprops handle, never having flown one.