I noticed my AT04-2 was rubbing slightly on the steering rack upon initial installation, but this was easily rectified by adding .5mm shimming between the aluminum bulkhead and the AM10 steering plate. (Moves it down slightly).
Just be sure and double-check the shimming for your servo rod after doing this to make sure it's not rubbing on the drive shaft. You may need to shim the ball stud up .5mm to compensate.