If you're getting any significant adverse yaw from an F-86 you've got the aileron rates set WAY too high. The BVM 60" F-86 is best served with a gyro on the rudder in rate mode, NOT heading hold mode. You really don't need one on the ailerons, but if you do, be sure to setup a mix to reduce gyro gain as a function of aileron stick movement. This way the gyro won't be fighting against your inputs, but will help dampen uncommanded roll movement.