I wasa cutting some TRC tires tonight on the track's truer, using their arbor. I beleive it is an OFNA, the arbor has one small stud sticking out, and you put the wheel over that and screw it on tight. It did the fronts fine, but it didnt make the rears true. It is obvious when you spin the wheel that its not true. Is there a good reason for that, like the OFNA arbor doesnt work with TRC tires, or did I do something wrong?