My intent was to have an external adapter for 5.25" floppy disks reading and I hope this can be used for some other 5.25" hardware. The other goal was to make this printable on a small printer.
Rear part is specifically designed to contain FC5025 floppy controller and SY-002-5-12 AC-DC adapter and they hardly could be treated as general case options - that's why I include generic 'rear_base' version (compare to see the difference).
Supports are required but be careful about face part supports as the threads supports may clog the threads unusable.

M4 threads may need finishing with metal instrument.
To complete the assembly you need four long (about 24cm) M4 threaded rods as well as M4 nuts (and washers).