I have made hot wheels customs in the past just for looking pretty, while parked. I like the idea of trying to merge that with the fuction of a racer. I've looked through the forum a little bit. (found this from your great youtube channel) The races on the channel like the Porsche tournament, Are those customs or just stock? I found your specs for the king of the mountain. Are there rules for other classes? Please post a link, if you have one, for rules or specs for classes other than for King of the mountain.