Made this video about a week ago, just making it public. I'd give the complete design but it still is in works. Each set up weighs in about 5 lbs so its a bit heavier than your standard wheel, but these get us over the ridge with no problem! We can fly over the ridge at full speed with no issue. Everything is mechanically maintained, having it flip and what not.
http://www.youtube.com/watch?v=gZXQDKlkhIo