GBC Balls can be lifted in many ways. For more complex mechanisms some fine tuning is required in the end to make the module work. With our GBC 25 Sweeper – 42049 C Model you can experience yourself how to make the sweeping mechanism work and what details to look for.
@MostlyTechnic wrote some nice words/review about our GBC 25 on EuroBrick. Give it a read and check out his video: https://www.eurobricks.com/forum/index.php?/forums/topic/170165-review-gbc-25-sweeper-42049-c-model-by-pv-productions/
Get the building instructions and start engineering today:
https://pv-productions.com/product/lego-gbc-25-42049-building-instructions/
See also our GBC C Model Building Instructions & other products: https://pv-productions.com/product-category/lego/