I remixed this in openscad so I could make it a little shorter, be able to adjust diameter of holes & make the plastic miss the solder joints on switch. I did not think it needed but one M3 bolt to hold it to the extrusion especially after I added the bump to fit into to the aluminum to hold it in place. Originally, I was using an M3 jamb nut to cut down on the height of the M3x10mm bolt, but then realized I could easily make a spacer out of plastic. The shortest M3 bolt I had on hand was 10mm.
I am also remixing the standard FolgerTech slider so I can add a micro adjustment bolt with loosing very little if not height from original design which I will upload shortly & add a link to it here.
This is about 11mm shorter than other design & about 4mm shorter than folgertech acrylic bracket. I added a photo showing the comparison to the folgertech acrylic bracket.
I used 2x M2.5x10mm bolts & locknuts to hold switch on plastic, but you could use M3 bolts
1x M3x10mm bolt with plastic spacer with T-Nut (M3x8mm should work without spacer)