Sometimes you have to accept that a first design is not always the best design ;)
GBC 28 has been reworked from the ground up due to imperfections in the first design. Follow the progress on https://pv-productions.com/product/gbc-28-pneumatics-power-platform-42080-building-instructions/
See also our other GBC C Model Building Instructions: https://pv-productions.com/product-category/lego/
