I made another ball machine element and an Instructable for it. I call the ball machine element Trick Flip-Flops. It looks like an element containing normal flip-flops. However, I call it Trick Flip-Flops because the flip-flops are weighted on one side and go back into place once triggered by a ball.
Sorry there is no video. I just couldn’t get the element to stand up on its own for a video. It will be in my next ball machine, though. You can see it in action then.
Below is the picture and link to the Instructable.