This is the interchangeable embosser frame meant for the the other embosser plate. This is perfect if you're going to customize the embosser pattern yourself and you only have to reuse this frame over and over again.
There are 3 types of these frames, the first frame were probably too large to fit even the MK3s, so I've included 2 other options to assemble them via filament, and smaller, preassembled frame. There's also a tab to lock the embosser plate in place so it won't slip out.
The tolerance of each side is 0.2mm to slide into the slot, and hinge somewhere 0.2-0.5mm
The author hasn't provided the model origin yet.