The Double Pump 2.0 Great Ball Contraption module from mickthebricker uses a sophisticated mechanism to push GBC balls to the top. This LEGO GBC module is featuring a compact innovative system with two pumps pushing your favorite soccer and basket balls within a central tower. This ingenious mechanism, that you can admire in action thanks to transparent walls, can cope with massive number of balls without jamming. Simple but smart, you’ll love to reproduce this classy pocket module thanks to free building instructions from Mick.
| Original design by: mickthebricker | Number of parts: 470 |
Complexity for building:  | |
| Price for Building: €€, affordable |
 | Download PDF Building Instructions |
PDF file provided by mickthebricker |
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