This is a remix of a design I made a couple of years ago for my BigBox. I made this design because I wanted my 7inch screen in the middle of my E3D Tool Changer, the current designs are asymmetric, because the PanelDue controller board is mounted directly to the backside of the screen. I made a bracket for the controller board which must be screwed at the back of the screen, and have used a 40pins (IDE) cable to connect the two. This requires some soldering (see pictures), since the connector pins are sort of mirrored on the standard 40pins connectors. Available on Thingiverse.
You can plug the controller directly on the panel, but since it is protuding the screen, you would have an off-centered case (and I like symmetry )
I've printed with PETG from Colorfabb. Sticks excellent, general thumb of rule with PEI is to set the bed temperature 10°C higher than recommended.
