The previous release of caterpillar tracks are getting a complete overhaul and de-bugging. They will still be available on Spaceport, but they are very prone to bugging out/not working.
Now for the new release! (Coming soon).
Introducing the Kerbal Mobile Launch Platform including new tracks (to work in conjunction with an upcoming FASA release). A completely modular set designed to create mobile launch platforms (or whatever you wanna make).