Assuming elevator halves are equal at rest and at full throw .........................

Falls to the left on verticle? Or does it pull to the left. It sounds to me like you're just experiencing the torque from the 55AX. Try flying a fast straight line and then pull verticle with the engine at idle. I will bet you that it won't pull left.

On my planes (generally overpowered) I always have to lean on the right rudder on uplines and any time I use full throttle. If you want to use your radio to mix it out program a few degrees of right rudder with full throttle. I prefer to just fly the rudder.

Adding r-thrust to the motor can help to some degree.