How can you tell the Fast speed gear set from the regular set? also what would be a good gearing to start off with a silver can? I just got my used roller and I am going to run it this weekend on an outdoor asphalt med grip track 71* degrees I have soft Shimitzu rears med Shimitzu fronts I think I read that was the idea setup. not sure on the rest of the car as far as setup goes. i think i will try it first and move from there. can't wait to run this thing.