Roshven in the real world, was originally mooted as the terminus for the West Highland extension, but landowner opposition amongst other factors led to Mallaig being chosen, and the rest is history. The back story however this line was built first with the Mallaig line being built later. In reality this would not have survived so I envisage a similar feel to the Ballachulish branch for this model. However the plan will allow me to run green 27s and 29s at first, through to blue 25s & 27s & maybe blue 37s into the 80's. Not forgetting class 20s. The RETB and large logo era will probably stretch plausibility too far, but that i doubt that will stop me. some very useful threads have been written on here over the years, including this http://www.rmweb.co.uk/forum/viewtopic.php?f=5&t=24258
One of the 4x2 boards from my old OO layout is the foundation for this, so construction officially starts when I strip that and modify it slightly.
West Highland Chalet (Glenfinnan) style buildings will be what I'm after, still gathering decent plans at the moment. Whenever I've sketched this out before finding something decent for the ferry pontoon has stumped me, but this time i think I've found it;
LangleyLaunch & Pontoon Set (N Scale 1/160th) Ref: 58102
http://www.langleymodels.co.uk/acatalog/Online_Catalogue_Boats__Ships__quayside_walls_etc_63.html
Their quayside walls look appealing too, but I'm not yet sure what height I'm going to build the jetty at yet, think I might just build from sheet material.
Oh, and I bought my first bit of rolling stock the other weekend too, a Farish mk1 BCK, so thats all the passenger services sorted then.
This about wraps up the planning stage tbh, I did contemplate N finetrax for quite a while but have decided to try and crack on with walking before I try to fly! Invernevis by David41283 has proven to be very inspiring and useful regarding the finescale option and also to just how good an N gauge layout can be in this sort of space, go check it out.