Nikon Rear Cap

A simple Nikon rear cap that I created. I've printed and tested about 5 of these and they all fit snug and twist on and off easily on different nikon f mount lenses. you do have to add supports for the insides as in my photos. I printed these face up. There is some slight clean up as with any 3d print. Ive also added a second cap with a slightly thicker rim.
please let me know if there is room for improvement or if this works good for you. thank you :)