Dry Erase Whiteboard marker clip / holder

I have 3 whiteboards that all have the same annoying clip for the marker, they all have the same problem where when removing the marker the clip comes out as well.

Made the area that goes behind the whiteboard larger and added angled pieces to better hold onto the surface.  Can fit one marker or two, scale or slice as needed.  Also included the design files (because everybody should do this) knowing different brands and sizes of markers may require modification.  I've tested with several Pentel, expo, and generic brands which all seem to fit nicely.

No supports needed.