Simply click on the link in my first post to go to Tower Hobbies for the price.

The prop adapter was secured to the flat spot on the motor shaft by first applying some ZAP Z-42 thread locker to the set screw and then tightening it with the supplied hex wrench. The prop, spinner, and backplate all fit perfectly without modification. The prop is secured by a second larger supplied hex wrench and the spinner is secured by two supplied screws.