Edited an rctestflight caterpillar track model to suit my needs.

Track dimensions are about 90mm x 20mm

Joined together by putting a ~90mm piece of a 1mm ⌀  metal wire. I found that straightening it by putting one end in a drill and holding the other with pliers worked quite well.

Thanks to rctestflight for the original model, this has saved me a huge amount of time