[rwkling1]

We also encountered this problem when we built our prototype. We found that the solution was to make sure our "hopper" was the exact size of the frisbees. In other words, the frisbees don't have space to tilt. My suggestion would be (if you haven't solved it yet) to take thin pieces of styrofoam or something easy to make and insert "shims" into the sides of your hopper. This will decrease the size of the hopper slightly, so make sure its as close to the size of the frisbee as possible. Making the hopper the exact correct size solved our problems. Best of luck!