The big part on the bottom hides the cables.
The plate is separated into two parts to fit the Mini+ plate. It can be printed using a large nozzle. I printed mine using a 0.8mm nozzle and the result looks great while keeping the print time manageable.
The spacers should maybe be printed more precisely. I used a 0.4mm nozzle for mine.
I didn't think about it too much during the design phase. In retrospect, it's not that easy to mount but it's doable.
⚠️ There are two sizes of spacers:
Use 4mm diameter screws for mounting. You'll probably need to drill the existing holes on the screen PCB since they're too small.
The author hasn't provided the model origin yet.