4 piece U1 cover adapter

This is an experimental remix based on beaverworks amazing top cover adapter:
https://makerworld.com/en/models/2031310-snapmaker-u1-top-cover-modding-for-ikea-samla-45l#profileId-2191227
(I can't add the makerworld remix link on thingiverse)

I redesigned it to be 4 parts instead of 16 and printing only on two U1 plates.

I do not own a U1 and I do not own a box so I purely went on the measurements provided by the original designer.