TL;DR
Conveyor belts no longer run on magic.What ?
Conveyors moving under their own power is silly. Perhaps an engine at the beginning or end of a belt (coal fed initially, but electric when tech permits) would make sense? It would be small (1X1 or 1X2 at most).Why ?
RealismHow ?
One tiny new buildingFledgling idea, so any thoughts or expansion on the idea would be appreciated