Hey, everyone!
We shot some slow motion videos (it moves so fast that it's still not that slow...), and we found that the catapult isn't even close to being optimized. We we hope we can push another 50 meters out of it.
See the video here:
http://www.youtube.com/watch?v=XqCeL_rW88M
(you can click "Watch in HD" on the bottom right for better quality)