Parametric Magnetic Box

UPDATE Added the ability to specify that the magnet holders are outside of the box and that they are either full height or partial height (partial meaning just tall enough to hold the magnet). For the outside magnet holders, you will need to use supports.Also includes other misc enhancements/fixes. ORIGINAL I saw a magnetic box online and thought to myself that I would like one of a different size. Instead of pulling their model into some app to make changes, I thought I may as well try my hand