75MM rocket motor simulator plug

While building my first 75mm motor mount rocket, I needed some way to ensure the motor retainer and motor mount where properly aligned. I'll also need a way to plug the motor mount for deployment test.

This model is based on Aerotech's motor and aft closure published dimensions. The model has a 1/4" hole in the middle for mounting a recover attachment point.

I added tape to my simulator to take up the remaining clearance when glueing the motor retainer in place.