Very enjoyable to watch, no problem to print it.
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.