I started with Nerftank and I am modifying it to work with my RC Car.
I am going to be using it in the snow and wanted to have more traction so I made the pads thicker and just a bit wider.

I printed it fast at .30 mm with 5 shells and 10% infill
I Love that it works with fillament to connect the tracks together.
kudos to LoialOtter GREAT DESIGN.
I simply melted one end flat with a soldering iron so it looks like a nail.
then pushed it through the 4 holes connecting the two peices then melt the other end of the fillament that pokes through.
you could pre-cut the fillament peices to about 32mm then melt one end and mass assemble them. the pictures do not show the metled part yet just the fillament strung through to hold the first group of peices together.
I have a long way to go yet. I am modifing some peices and its a long print process to make them all. I will post the compleeted project with video when I'm done.