If you don't have a 3D Printer we also sell pre-printed units with a key chain at on our store at:
etsy -
16bitgamestore.etsy.com
eBay -
ebay.ca/usr/16bitvideogamestore
There are 2 versions of the top part, version 1 is the one I sell which includes slots for 2x 10-32 Nuts to ensure a secure closure. version 2 is designed to be used without nuts, the 10-32 screws will thread the plastic. Not sure how long it'll last but it uses less plastic.
I will recommend that you have a thickness of 5 walls to ensure enough structural rigidity on all of the smaller components with a 0.4mm nozzle.
The author marked this model as their own original creation.