Modular requestor for request stations of arbitrary size. 1) Decide direction (left-to-right or right-to-left) 2) Place first unit (no config necessary) 3) Place next unit 4) Connect SELECTOR combinator input with GREEN wire to neighbour 5) Increment index in SELECTOR combinator by 1 6) Connect DECIDER combinator inputs with RED wire to neighbour 7) Repeat steps 3-6 for additional units