Here is the phone number 803-242-5319, ask for Bruce.
The chassis hasn't received as much attention as the others mainly because there isn't tons of people on here blowing it all out of proportion. You'll like it, I ran one until the TC4 came out, and had alot of success with it. Just make sure you ask him for the 3mm, we played with a 2.5 for asphalt, but the 3 still worked better. With the 2.5, you will have to add a ton of weight if your track techs that stuff.