If you know some 'out-of-work model railroad elves' let me know.
The 'drawing' was generated with SCARM by yours truly. (It has taken many months of planning and re-drawing to get to where it is.) I then exported it to an emf file and ultimately converted it to a digital pdf and sent to a commercial printer. The scale on the first draft print was slightly off so they had to re-scale and re-print it. If anyone out there is thinking of going this route, definitely check the scale of the print when you receive it.
I rolled out the sheets, positioned and seamed them together. I used a piece of masking tape every 2' or so to 'tack' them together. Once it was 'right', I used a quality clear tape to carefully bind the full length seams. If I did it again, I would find a printer with wider capability like 60" or more and include an inch or so of overlap (maybe 2 seams instead of 5).
Next, I cut the printed template to mark where to 'cookie-cut' the homasote and plywood for the various grades in elevation. I taped the template to the homasote as I proceeded to maintain correct location. (see the latest photos)
More to come...
DL