Szilard Gyalay from the USA build our latest GBC 52 Flight Fair made from the LEGO 42152 Firefighter Aircraft set. Once setup correctly he made a nice video of it in action and even including an epic slow motion part where you can see the GBC Balls fly. See around minute 00:40. See also his review here below. Thanks for sharing with us!
GBC 52 Flight Fair - 42152 Building Instructions