Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4660994.

Wanted something very simple to mount on my 1010 desk. Made this so I could create more inserts for different types of things. Easily interchangeable. Minimal supports needed for insert. Base can print with no supports.

Made mounting holes large enough to secure with a 1/4-20 nut. sunken in so you could cap them to hide the nuts.