VESA mounting Hamclock case

Added 100 mm VESA mount feature to grajohnt's hamclock case. My mods hold 4M hex nuts. You should probably glue them in, so that they don't come loose and fall into the electronics.

I designed the 100 mm VESA mount bosses and nut holders using OpenSCAD. Created STL file to cut holes for the VESA mounts in the hamclock case using subtraction in Microsoft's 3DDesigner. Then inserted the STL file for the VESA mount, put it into position, and merged the objects.

My OpenSCAD source files are available in:
OpenSCAD files for 100mm x 100mm VESA mount
https://www.printables.com/model/736186-openscad-files-for-100mm-x-100mm-vesa-mount