I love the default Mooney Bravo provided with Flight Simulator, the problem I
have is that when climbing, cruising, and decending, it tends to yaw/bank to
the right or left. I apply one "unit" of rudder trim which is too much and it
starts to slowly yaw/bank to the other side. It does this with realism
settings set to full positive and full negative. I have tried wing leveler and
yaw damper and neither help. The rudder trim isn't in small enough units, it's
either too much to the right or too much to the left. It also yaws/banks with
low power settings, neither power or airspeed matter. Can anyone help?

Ben