I needed a simple way to mount the Klipper Expander board in my Voron v0.1 electronics bay, so I created this bracket to allow mounting it on any extrusion. Tested with 1515 extrusion but will work with any other that can accept M3 captive nuts.

It mounts using M3 bolts and nuts. The spacer is made of 7 M3 0.5mm shims (or washers).