Summary

Optional SD card flipped over so it's right side up mod. I grabbed the dimensions from the MOSFET add-on by petrzmax, which actually made it look possible.

Print at any layer height. .2mm is fine. It needs 2 extra M3 screws. The same length as the rest or longer. Doesn't matter. It's just held on with those 2, but also with the case opening. Just make sure the front 2 lower screws aren't touching components on the card slot PCB. It shouldn't be a problem though.