Locking focuser cap Orion XT8

I got my scope second hand and it was missing the cap for the focuser, so I made this one that covers the focuser, and 1.25" adapter. There are L shaped slots cut out to go over the set screw knobs so that the cap can be locked in place.

Loosen the 2 set screws holding the adapter so that it is free to rotate.
Slide the cap over the 3 set screws and rotate to lock on. Then tighten the setscrews to the cap.