Interesting idea, you could also have the following scenario if done correctly.
1) the fiddle yard that we currently have.
2) the station section that we currently have ("Durham railway")
3) board 3 is the small viaduct/bridge that belongs to board 2 ("Durham railway")
4) another new board will be built featuring a plain embankment (Evenwood)
5) features an embankment with road bridge
6) end fiddle yard
means you could have 6 boards
Sounds like a good idea, you could have the a small junction for the private owners line joining the mainline with a Signal box and a set of catch points.
Great looking progress, nice see the scenery section coming along. I agree with daniel8910 perhaps adding a turntable and a road going on to the mainline could be added, it would certainly add extra operating movements.
Or
Your could add perhaps a goods yard to go with the station instead.
Ive had the same issue, and had been searching today for a solution. Ive decided to replace the encoder altogether, although im some what confused as why the Junior has 3 wires going to the motor, any idea why this would be?