The original SketchUp 3D model was drawn using 0 gauge scale dimensions, basically the actual scale of the model and the cabinetry it will sit on.

I have made a new 3D model using the space but scaling it in real dimensions. Thus the 2.4m x 0.6m layout actually measures 343ft x 86ft in full scale. This doesn't seem very much space. Here is a view of what I have "built" so far:

I have discovered a couple of errors which will need a major revision, unfortunate after all the effort of making the ramp up to the coal hole as this will have to be modified. Basically the minimum radius of curved track is 6 scale feet and I had used 6ft as the diameter when drawing the curves! This only affects the road coming into the turntable from the cassette and the road going up to the coal hole. The coal hole may have to be redesigned to something very similar to Monument Lane's original coal hole - the tank covering two roads, one of which rises to allow coal to be shovelled directly from wagon into tender. I don't like this much, so more thought will be given once the access road is re-aligned to see if the current plan can be maintained in some form. One key reason for keeping the current design is that during the 1950s two qualities of coal were used, best Yorkshire for passenger engines, poor coal for goods engines.

I know that a larger shed (such as Monument Lane or Bushbury) would have had an LMS concrete coal tower and steel framed ash plant, but the concrete tower would look a bit ridiculous on a two road shed layout!

Incidentally, the previous post on the research books will also be most useful in determining where to place all the smaller buildings and so on.