Firstly, this is a fun module! I love the all the motion you get with multiple balls going down the track. Lots of fun!
Secondly, if you haven't made yourself a marble machine, this is the way to go. Fun modules, multiple configurations gives you all kinds of combinations.
So what are you waiting for?
No problems printing file.
Very baffling to watch.
This is easily my favorite module. I have it sitting as the first module in the 2Wheel base so it collects 4 balls then runs them down at once. Everyone seems to enjoy watching the balls chase each other down the track. For extra fun, stop the balls 1/3 down the track with your finger and let them back up till you get a dozen or more in a line. Then remove your finger and watch them all race down the track.