PCB board hold down for Genmitsu 3018 CNC

Holds a 145mm x 64mm stripboard (~1.2mm thick) fast to the bed of a 3018 Genmitsu CNC. Doubles as a wasteboard.
Seems to work well enough for cutting the copper traces, drilling through-holes and cutting out sections of the PCB.

The T-channels are spaced 45mm on center, and so are the holes in the hold-down board. Use with M4 bolts and nuts. Print four of the T-channel anchors, and two of the braces. The braces slide on from the side, or you can just snap them on from the top.