Simple.. make the running line and the shed roads paralell and make the shed roads about 3 times longer with less gap between the repair shop and the running shed. The repair shop shouldnt be as long by the way, only about 3 engines long.. then behind the running shed off the main line, place a right hand point, 2 10m strts a right hand point curve, then a right hand point, curve on the end of it and make 2 carriage shed roads follow the running line

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Chris
Any chance of a shot looking the other way towards the platforms?
Just looked at the shot again... are you using finescale trackwork? If so might i reccomend normal track retextured? Gives a chunkier NG feel to it, and also allows the use of dynamic track, a god send when laying single line branch lines!