I just checked the amount of side thrust on my yet-to-be-covered Hog Bipe. Without adjustment it had a bit less than 1 degree left side-thrust. I just finished shimming the mount with two washers top-left and bottom-left engine mount to firewall. This adjustment has given me just above 2 degrees right side-thrust. Of course, this is AFTER I had fitted the fiberglass cowl. I needed to open up the clearance around the prop backing plate. Need to make sure I use a big spinner to cover that error.

In the future I will use Deadeye's approach on my planes. Much less retro fitting ...

Good stuff this RCU forum!!!