From what I am reading on other forums, no RS600's have been shipped yet. Apparently they are having issues getting the gearsets made. The bigger question here should be how they arrived at a 600ft/lb rating by simply changing an input shaft to 26 splines. Considering the fact that the factory version T45 (1996-2001 Mustang GT/ Cobra that used a 10 spline input) was only rated at 320ft/lbs and their transmission dyno is simply a free spin test machine that doesn't actually put a load on the transmission (it only free spins the output shaft at a specified rpm), I am guessing it is derived the same way their "no hack job" motto came about.