Customizable Magnetic Hex Bit Holder

A modification of another hex bit holder here.
I wanted magnets that didn't need to be glued in, AND I didn't want the bottoms of the magnets exposed to pick up all the metal filings in the shop.
By using 8mm magnets and adding a bottom cover that slides on, I have what I wanted.
Even with the bottom cover, the larger one I made sticks to the metal toolbox quite strongly.

You need process the file twice. Once with:
cover=1; holder=1
to make the bit holder, and once with:
cover=1;holder=0
to make the bottom cover.

11/8 - fixed a couple errors in the file.