Gridfinity 20x & 16x Paint Marker Holder: 1x4 & 1x5

Holds 20x or 16x Paint Marker holder respectively on a Gridfinity base. Using Paint Skills Paint Markers from Sam's Club 18x pack.  15.8mm Slots   These Markers should be the same size: https://a.co/d/15B5c96 These are the magnets for the Gridfinity base and bottom of the holder: https://a.co/d/cU4lD4m Original Model by @plomdawg