I have modified the file to create a lid that attaches to the box, without having to have two separate pieces and without needing to use magnets to keep it closed. I have also made a cutout in the space where the tool goes so that it can be stored without having to remove the polishing tool.

It was printed in PETG, but it can also be printed in PLA without any problem.

Assembly is very easy. Simply print the two parts separately, using supports only on the base. Then, simply remove the supports from the parts and snap the lid onto the base. It must be able to move freely so that the lid opens and closes freely.