MPCNC Belt Tension Add-on

While cutting a large print I had one of the belt tension zipties come lose and cause the endmill to drag an 1/8inch too low across my carving, so I looked around for a different way to keep them tight. Most of the other tension devices require you to reprint the corners, so I modified one version to fit the original corner.

Part A requires you to replace the whole top side of the corner, but Part B slips into the original Ziptie hole of the lower corner. You may have to trim the tab on Part