Place a piece of tape on the side of the mint tin you want your USB ports. Mark out the measurements taken earlier onto the tape.
Take into account that the hub needs to be aligned when it’s placed inside the tin, therefore you will need to leave a little room on each side.
Use your Dremel to slowly and carefully cut the ports. The cleaner the cuts, the better the finish so take your time. The smaller cuts can be difficult; however, as long as you score the surface enough, you can push out each port with a screwdriver and finish with a file.
Smooth any rough edges with a hand file and test-fit your USB hub. Minor errors can be corrected with the file.
The smaller cuts may be difficult to make without scratching the rest of the tin. You can use worn-down cutting discs as they’re easier to make small cuts with.
You may want to place a cloth or rag on your work surface while you cut the holes to protect the tin from being scratched.