I have a 2 stroke Rotax 503 that doesn't have the Square Hole in the end of the crank to add Oil Injection. The Flywheel HEX. NUT is M22x1.5 Thread. If I could make and Adapter Nut that has the Square Hole on the end of it, I could just shorten the White Plastic Shaft. The square hole is .25". Even an Adapter Welded to the Hex Nut might work. Looking for some idea's.