Jimtyp,
I more or less used drawings of the Sierra Railraods, Angels Camp Depot, but of course had to use some compression.
Even so it ended up 56" long, including docks.
The battens are done by saw cutting a 3/16 wide by 3/16ths deep groove then gluing and nailing in a 3/16ths by 1/4 batten.
I think this method,although time consuming, gives a very weather hardy surface.
The roof is 20 gauge galv. sheet with a wood edging glued around the bottom side then covered with 30# mineral felt (real roofing)
Here again this should be a very weather resistant finish even though it isn't very scale perfect.
The chimney is just a block of Redwood cut and grooved on the bandsaw with the vertical brick grooves hand cut. Paint mostly for the finish.
The flashing is a solid piece of 26 ga siliconed to the bottom before attachment to the structure.
Those switchstands are Sunset Valley. I have had very good luck with them and love the way they look. Of course these are on a raised
layout not on the ground so snap off is not a major issue.
Thanks for your interest.
Rick