My 13 is so damn good (with Carl's shock revalving and fat boy spring on the rear shock, venting and Carl's clutch kit) that I am happy as the proverbial pig in S@#%! however, I will be putting a Camoplast 3" track on it for next season because I saw personally how well they work. Camoplast is supposed to be making a track that will work with a center extrovert driver which makes cutting the rails and the anti-stab kit unnecessary. That track flat rocks on stock or modified sleds. I know because I observed it. My Service Manager says it is the single best mod that you can do on a Pro. I believe him!