For competitive purposes, I've established some house rules. If a ball rolls back down the ramp you can replay it. If a ball bounces off the board and...
Step 17: Ball chutes behind target
The ball chutes that take the balls to the return ramp were made from stiff single-ply cardboard and lots of hot glue. This was an interesting challenge all by itself. I considered using pipes or a wooden structure of some sort, but nothing else would work in the amount of space I had left.
Once all the ball chutes were completed, a back panel was installed to finish it up.