Put a couple of washers under the left side engine mounting bolts. Most people trim their airplane after selecting the prop.

Hey OscarPilot:
Move your aileron trim all the way to the left, move the rudder trim all the way to the right, move the elevator trim all the way down.......now just fly it. Does that make you a better pilot? Geez, flying an out of trim plane is like playing an out of tune instrument.