I still need to test to make sure it fits together after 3D printing, but I've designed a new cover for the RFID electronics. This should make it much easier to assemble the electronics for the badge reader and much easier to mount to the wall.
I also took the time to use a better tool. Instead of old reliable OpenSCAD, I've switched to using Onshape as they offer free access to a quality CAD system online! It's a bit more intense to do real parametric modeling, but way easier to work with than OpenSCAD once the design gets any complexity. Check it out! I've put a link to my document (available for free to everyone) on the github readme.