thanks I saw that one. I just ordered the 3Racing 4mm chassis. I have too much flexing with the stock chassis. In my novice class I came in 2nd. I ran a short track with a high gear ratio I used at Kissimee race tack last year. Oh I use 40% barons fuel =). I just added some shims to the OS TZ 12 3port because I saw some pitting on the piston. I love this car!!!!!!