I use the x factory infinity chassis which is similar to the exotek chassis. It's brought the weight down quite a bit, but I've found myself adding weight back to the truck in the rear. I felt there wasn't enough weight in the rear with the pucks and a shorty all the way back. I took the pucks out and that helped a lot. I've since pit the pucks back in and added the brass c block, but I haven't had it on the track yet.