Screwless Tool holder for Monoprice Maker Select or Wanhao Di3

I printed the original version from xenz, but was disappointed that the factory screw wasn't long enough. So, I modified the model in FreeCAD to add an arm that can be slipped into the opening at the top corner of the Z axis frame, for a version that needs no screw for attachment. Just insert it into the hole and load up your tools. This can be used on either the left or right side.