I also plan on using an RX8/T8 1900 combo in this, likely with a 5000mah 4s pack, unless Tekno suggests otherwise. It should prove to be way more than enough power and allow it to run long periods and stay cool (I like to go practice for basically a day of non-stop running), even in the heat of sunny outdoor summer racing.
Blair's setup, as has already been mentioned, is a 1/10 ShortCourse Castle setup.
I'd like to know what was in the buggy that just won though, for comparison sake.