Great original model, but when I configured negative volume for 1.8mm magnets in PrusaSlicer, the layer above the holes were inconsistent pattern-wise and very thin. Also, the bottom fillet could introduce a little bit of sag. I thickened the bottom by about 1mm and added the holes in Fusion 360.
A perfect fitting incognito mod if you align with the screws per the original instructions and print in Prusa Galaxy Black filament!
The author remixed this model.
Remixed with a thicker bottom to accommodate thicker magnets without print artifacts on the bottom of the tray and remove the fillet for more consistent printing / flatness