Andrew, looks very nice, although I model in O it's indoors and therefore would not have room to use one of your structures. I would think though that a model of the overhead yard cranes sometimes used in the UK would be a good addition to your models if you want to try the UK market. They usually spaned two tracks and a roadway with a gantry across on 'A' frame legs each side and a hoist trolley in a wooden 'shed' running on two rails. I do not know of a picture of one, but there were a number around the UK the one I knew was at Eastleigh north yard. They where use for lifting containers of conflats for mainly the removal trade and meat industry.
regards
mike g
regards
mike g