you have to remember that your track is designed and prepped to favor 1/12 scale cars. To me, the Traction Action that is being sprayed made my car very inconsistant. My schuie was always a roll monster on carpet when I first started running carpet with it, of course that was when the spec tire was a sorex 28, I had to CA the sidewalls to cure the rolling. the car works great on jaco blues, (on carpet) but now were back to a tire that has more traction then the blue. so a little CA may be your friend. heavy springs will only make it roll more. blue springs in the rear is to much. I also find mixing brands does work very well, shouie says its a 16.0 lb blue spring, but its not, its actually heavier then the 17.0lb ae blue spring.