STL file of Oogoo tread mold for RCS hex chain links.
Scaled properly, they should fit over each link
daisy chain and roll the links to form a track or wheel

3 mold plates are set snugly over base plate with pins
you can also just set one or 2 mold plates over the base
(to switch up Oogoo colors)
a leveling bar also tags along for a clean edge

review the various links related to Oogoo, and try this mold