Just found this thread. Nice! I did Battletrax once back in the mid-90s when Buell brought it here to Frederick, MD. A local email list used to have practice days with large figure 8s and a set of small circles in a triangle pattern set up by one of the members. Here's a pic of me from back then to give you an idea of the size of the circles:
I can get the specs on the circles if you like.