Basic sleeve case for the Raspberry Pi 3 that is rack mountable and has a slot for a POE splitter(https://smile.amazon.com/gp/product/B07CNKX14C/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1).
This is a 1U rack height design with grooves on the back side for a panel that allows you to combine 2 of these with a center blank panel(not designed) to fill an entire rack space.
It's a tight fit, but with some work the pi will snap into place. Very difficult to get out, which was the intention. The SD card can be inserted into the case after the pi is installed but it is difficult to remove without needle nose pliers or tweezers.
FWIW I use 70mm/s print speed and the platform is at 60C with the extruder at 205C.