@ NormP: Thanks Norm for the thought. I haven't used 'Layers' on routes myself either, so I guess I would need to discipline myself to organise what I wanted to achieve, right down to the last nut and bolt.
I tend to work on the more difficult stations first, but if I can't locate a particular asset, then I'll put it aside and start on another section, which may be easier to work on.
What I should have done in the first place was to build each station on separate baseboards (routes) by using layers; then when each was completed, merge them into the 'main' route. If they were incorrectly placed, copy and paste into where it you want it. I'll have to read up on layers again.
Cheers,
Roy3b3