The local track has a class that races JK Hawk 6 Wing cars on a King track. I picked one up and they are a lot of fun right out of the box. We can change the body, gears etc. I am looking to see if any one has some suggestions on gear/ drive ratio for the Hawk 6 and bodies as far as rib, no rib etc.? I have a lot of parts kicking around and would like to get a good base line to work with.