All I did was add holes in the bottom of Robagon's and liquidlogic's pillars for 6x3 magnets to use them in Xevin's MagHex Gloomhaven Tile System (links below) but other magnetic systems will work too.
It was an easy and fast edit on TinkerCad, but I figured its worth posting if even one person needs it :)
https://www.thingiverse.com/thing:2990524
https://www.thingiverse.com/thing:3530085
https://www.thingiverse.com/thing:2795712
The author hasn't provided the model origin yet.