Borrowing from the original description here:
"A PLA/PETG printable bottom case for the Ferris Sweep High. The case is designed to accommodate one layer of 2mm thick foam that sits between the PCB and the bottom case. The foam slightly deepens/mutes the sound of the choc switches making it sound better compared to the sound on the bare PCB. The PCB is then screwed to the bottom case using the existing ‘tenting pucks’ screw holes.
Important: this case might not suit other versions of the sweep since different sweep versions may have different edge cuts.
For the full build you'll need the following items
Tips: It's sufficent to use 3x screws to tighten the pcb to the case, since one of the screw holes of the tenting puck is hard to get to with the choc switch being in the way. (Remixer's note: I don't know if this is still the case, however I have no issues reaching the screw holes with larger Alps switches installed.)
The author remixed this model.