Easy Mount Dry Erase Accessory Holder - Pens, Eraser, Cleaner

This is a dry erase board accessory holder for the pens, eraser, and a bottle of cleaner. It is very easy to mount, it just slips behind and hangs on the upper corners of the dry erase board.
It is based on the design by LindySquirrel thing:1133453, and was designed using the free student version of Inventor 2018. The inventor files are included. STL files are in mm units.