The Delta V15 props we've been using don't quite fit onto the motor shaft. We cut small acrylic adapters using a laser cutter. Every laser cutter is different, so if you're doing this at home, you'll want to use a digital caliper to make sure the small circle fits...
Is that the final distance from the prop to base of the motor. about half an inch?
cool - I take it this solution is meant to be epoxied into place?
We never epoxy it. It's really tight. It takes a bit of force to squeeze it on. Epoxy would work, though.
No, that's just to show how it fits on. Push it all the way on - down to the base of the shaft.