SpaceChem Challenge Falling 1720 Cycles

My solution for the challenge Falling. 2 reactors 72 Symbols 1720 Cylces First reactor fuses oxygen to Zr and pushs H to 2nd. There blue and red alternate with production of Y (blue) and Nb (red). As the H arrives directly on the fusor, that is done with simple chains of in-alpha and fuse. Reactor 1: http://img339.imageshack.us/img339/29... Reactor 2: http://img856.imageshack.us/img856/80...