Mount the Printrboard controller on your Aluminum Mendel, or any other 30mm extrusion.

The board mounting holes are offset slightly for left and right. This is necessary to give enough clearance to the USB cable and SD card slots. I printed them with 90% fill.

The board is mounted with small self-tapping screws. The brackets mount to the extrusion with T-nuts.

For now, I have a rats nest of wires dangling above the board. I know I ought to enclose them with a proper case, but with the board inside the frame, it's really not too vulnerable.