Yeah I copied the track design from the "Zhuk" or "Beetle" vehicles built in a fellows garage in Novosibirsk, really high class work. The crimped tube crossmember goes as far back to 2010 from a guy in Chelyabinsk I remember (thanks Internet).
I built a bender out of scrap to bend the round stock guides. I will try to get a picture of it tomorrow.
Aha here is their website , I knew I had it bookmarked!