3Drag, Vellemann K8200 - Raspberry Pi (B+ and 2) with PIUSV case for Octoprint - Open SCAD

This is a case I have re-done form an idea I had seen somewhere here in Thingiverse. What I wanted is a case for a single purpose. Just to house the Pi as Server for Octoprint. Nothing fancy. In the picture added you can see the battery holder for the auxiliary power supply to the PI as well as the case of the 5V power supply. The idea with this set-up is, that once I switch of remotely the power to the printer, the Pi goes (gracefully) by itsself into a safe shut-down mode. Just switching off t