Great Ball Catalog is an independent, fan‑run site and is not associated with, sponsored, authorized, or endorsed by The LEGO Group. LEGO® and the LEGO logo, the Minifigure, and the brick and knob configurations are trademarks of the LEGO Group of companies. ©2025 The LEGO Group.
If you build GBC modules, join our Discord server and get in touch with other GBC builders just like you!
Cup to Cup Type 1 by Akiyuki