I am trying to decide where to mount the booms on the self serve wash I am rehabbing. The wall next to the pump room, I can mount the boom in the center. The other two bays the block does not go all the way to the ceiling in the center of the bay just about 4 feet on each end to the ceiling. Would you get some stainless steel post made to mount the booms in the center or would it work okay to mount the bracket on one end of the Bay?