Hey! Looking for a compact, easy to build and entertaining GBC module? Two Turning Arms module from the Dutch builder LegoMarbleRun is certainly what you’re looking for! With its elegant and astonishing mechanism, this satisfying GBC module is perfect for whoever wanting to start with Great Ball Contraption. While pivoting on themselves, the two arms of this build are alternatively elevating your favourite basket and soccer LEGO balls. Balls are feeding the rotating arms thanks to a clever stop and start mechanism. What are you waiting for to reproduce this great pocket module?
Original design by: LegoMarbleRun
Number of parts: 380
Complexity for building: 
Price for Building: €, cheap
Two Turning Arms, on LegoMarbleRun YouTube channel
Discover and reproduce Two Turning Arms GBC module, rebuilt by Planet GBC:
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Two Turning Arms – from LegoMarbleRun
Building Instructions + Parts List
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