I said my Twin never broke a gear. That was my single. I run on asphault, with SportTraxx tires(as per videos above) and take jumps that would destroy most trucks. Cmon, you've seen all my videos. You know how I drive and how my trucks hold up. My slipper is locked down and I use hard brakes to control the truck in the air. Though I don't have any videos uploaded with larger jumps, these are some I hit on a daily basis. And I'm sure you have seen the 12ft jump I have on my track. No videos of the Twin hitting that, though. Just my word.
Edit- I forgot to mention I also run a spool, traction isn't a problem for me. Control is.
Here are some jumping vids
http://s252.photobucket.com/albums/h...nt=maxx038.flv
http://s252.photobucket.com/albums/h...nt=maxx032.flv