Everything came together smoothly on the rail, and ended up fitting in snugly with the 19” of space I had between rack rails.

In mounting the Pi4 to the rail I found that most of the existing Pi cases for DIN rails aren’t that great, so I designed the one shown for laser cutting and bent it up using a hot air gun. It includes space for the (unused) battery, wire management tie downs, and mounting for a 40mm fan. Temps with the case and the fan running + an aluminum heat-sink have been between 35-42c.

You can download the DXF’s here - Top & Bottom (Credit is nice if used)

With all pieces mounted, I set about attaching the rail assembly to the rack. Not shown is adding in the smallest piece of fingered conduit I think I’ve ever seen (0.75” wide x 1” tall).