Josh DaVid is a GBC module engineer and builder very active on Youtube. His youtube channels contains tons of GBC module videos and original LEGO creations. Josh is also an amazing conceptor of compact GBC modules working in a full loop and called GBC miniloop modules. Josh is then great in building kinetic sculptures on top of GBC design. An excellent and huge source of inspiration for any new comer in GBC or LEGO automata building.