If you are running a motor with No Pilot, this 6 Bolt Pilot Washer will help you get things aligned.
This has a 3/8" Pilot for your Tru-Turn Spinner Backing Plate, followed by a 1/4" pilot for prop alignment.
This works well on a lot of the older motors.
5 Grams
PILOT WASHER SACHS 6 BOLT (ALUMINUM)