The above K&P/Harry Jones kit is the one I used as a base, adding a scratchbuilt covered
trestle along side it to deliver the coal, and vertical "concrete" (PVC pipe) silos on the
end, as a way to combine all three types into one, and to get something different. I moved the office to the right end to narrow the footprint (and promptly lost that
advantage by doubling the width with the covered delivery trestle). The silos lengthened the footprint, too. I did not think of it, but it might be possible to run the trestle into
one end of the basic K&P kit, getting that difference and a way to deliver coal, but
upper structure might have to be widened, and then you would need to add silos or
covered bins like the Crosby structure to replace that lost storage. Like wooden grain
elevators, probably no two were alike, so your imagination can run rampant, unless
modeling a specific protoype.