Lego GBC stepper - GBC 4

This is an incredibly satisfying gbc I made. The official marbles work, however I used slightly smaller ones for effectiveness. It can fit four marbles, and I used a small motor which comes with lego set 45544 ev3 core education set, but you can just hand crank it. If you enjoyed this, please subscribe. If you want a tutorial, just ask and there's a chance I will upload a tutorial video.
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