I made a Swappable hot end on which this grinder can be placed. I intentionally placed the female version of the d sub connector at the tool side because the mixed male version fits a regular female one and not vice versa.
The tool this holder is designed for is the RS PRO 398D PCB Drill https://nl.rs-online.com/web/p/miniature-power-drills/0547616 which costs under €30,-
This grinder which runs at 12V which is the same voltage as the part end fan which I use to control this drill so you don’t have to enable it manually. Just send M106 and M107 to enable or disable this grinder.
I have just uploaded a 2020 t-slot plate which is an ideal build plate if you want to mill, drill of grind things with your printer.
I have made a video about this upgrade and it shows how I create a PCB with it. Have fun watching!