there was a few very impressive machine's out there. the first impressive machine i saw took note of was team 236 the techon tickets. there machine looked and drove sweet. the only issue i can think of is that everytime i walked by there pit no student's working on the bot, it was always adults now it could be totaly possible that i only happened to walk by at the wrong time.
(very jealous of there pit set up)
just a side not but if you thought you were going to stack more then 2 in any way shape or form, sadly to say but you were wrong! not only was every stack getting knocked over but ever stacker or bot that wasn't able to get under the bar pretty much ended on the wrong side at least once.