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This is the assembly that fits on top of the rotating duplo control. Since the studs are double-sized, you have to have to use 2xn bricks as the primary interface between Lego and Duplo. This assembly has a pair of 2x4 bricks with a couple of plates on top and a big gear set onto the plates. A worm gear (not shown) engages the big gear, and the Znap flex shaft fits through the holes in some 2xn Technic plates (not shown) above the gear. |