Master Builder Ken Gross (USA) build one of our latest GBC 29 Heavy Duty Pump – 42063 C Model. This very effective and nifty design can be used in any big GBC loop or as a stand alone module.
Inspired? Get the building instructions and start engineering today:
https://pv-productions.com/product/gbc-29-heavy-duty-pump-42063-building-instructions/
See also our GBC C Model Building Instructions & other products: https://pv-productions.com/product-category/lego/