Who's of you make flat spot on motor shaft??

[magudaman]

I drilled my shaft. I only nicked it just enough so the very tip of the set screw goes down in and self centers in the hole. It works great as long as I don't have to change the position of my pinion gear because that would require a new hole.

[zeropointbug]

That looks great, just make sure that it is big enough for the set screw to sit in, then that would actually work the best.