Very good JimmyB , you are heading towards a system that could work for Timetable Operations.So to the expanded railway, as most of you will know slabs laid, and here are some photos:
The new junction:
View attachment 328722
A view up the track:
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The track approaching seat corner, notice the track each side of the leg to ensure a better curve:
View attachment 328724
Round the bend, this will lead to a 'dog bone' return circle:
View attachment 328725
A nd finally a view back down the track:
View attachment 328726