I liked the Magnet Revolver but did not have enough magnet varieties to need all 8 slots filled and did not want to print a duplicate of a size so I designed a blank module. Afterwards, I saw the gauge piece in the Rotary magnet dispense but wanted it to work in the magnet revolver so I added the spaces and numbering to my blank module.
The author remixed this model.
I took the 20mm piece and filled in the space to maintain the contour to make the blank. For the gauge I used TinkerCAD to add spaces and numbers to measure the thickness of the magnets.