took me a while to figure out power was coming from train motors through a 8 teeth gear x) i like how everything has its function, there is no "fancy looking design only" part there, and it looks stunning. When form is dicted by function :)
That is the original LEGO® double crossover piece, that's why there are two rubber bands for one side; The switches can't be set that way other wise due to the common switch stand in the middle.