Thanks, I remember seeing that one now. That is WAY different from what we're doing though. They three have major differences right now.
1) 45 degrees approximately which is cause the Frisbee to leave the arm at a right angle.
2) it's probably a little under powered.
3) Although probably not a huge problem, the self the Frisbee is sitting on does cause some problems as well.
Here's a couple videos.
http://www.youtube.com/watch?v=07zmzc4vC2Y
http://www.youtube.com/watch?v=otX9pYqXYkM