Published on June 25, 2017
Great Ball Contraption(GBC) at Japan Brickfest(JBF) 2017 Fan Weekend.June 10-11, 2017 Rokko Island Kobe
23 GBC modules are built by four persons. 250 balls are used.
Akiyuki (13 modules)
Takanori Hashimoto (yattaran) (3 modules)
Katsumata (5 modules)
Y. Kuramata (2 modules)
 at Japan Brickfest 2017){kind=link}