Yes, SR2 has a clone. After Dan Cronin of Viper Scale Racing finished building SR2, he quickly made another version. The only difference I can see is that he spaced out the pit and start/finish gantries to make fuel races a bit easier than the original version of SR2.
The original SR2 was designed by me but with a whole lot of input from local racers who own routed tracks and have raced on some of the most magnificent racing tracks ever built.
SR2-2 is no longer in Utah at Viper’s facility but it is still in use. In fact, the last time I saw it was at Musgrave Racing’s shop in Riverside, CA.
SR2-1 is still alive and well in the Santa Cruz Mountains. We haven’t raced on it in a while but I recently did a whole bunch of laps on it building two new Tyco-Jets for my IROC fleet. It is a very cool layout and the fact that it has multiple layouts, as well as converts to an oval, is very special.