Gridfinity Bin Magnet Jig

This is a remix of Jool's original design. This is for installing magnets in bins, for installing them in baseplates see this project instead. While using it, I ran into two issues. First, sometimes glue would get on the jig where the magnets were supposed to be, and then magnets would get stuck to the jig instead of the bin. Second, it was sometimes difficult to remove the magnetic part of the jig from the base, as there wasn't much room to put your fingers to hold down the base of the jig so i