There have been countless LEGO marble runs to the present day. I think build these with LEGO allowed for great creativity. What I was looking for in this project was a system that allowed fluid motion, dynamic speed changes and maybe the capability to go for a looping. On my search I remembered this ingenious LEGO Great Ball Contraption (GBC) Layout video by akiyuky. It features a great marble run module. In the picture of this update you can see my first test of this system. Later on I was very happy that it was also possible to build a looping and incorporate the needed seesaws.

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