We painted the skyboards a light blue color for now.
It was time to convert the track plan into an actual layout. I printed the plan full-size. I could then tape pages to the 1/2"-plywood layout surface, custom-cut to fit the area, and transfer the plan to the plywood.
I used the cookie-cutter method, so once the track plan was on the plywood sheet, I used a saber saw to cut out the track area. Two sections of plywood sub-roadbed were glued together with a simple splice, as is shown below.
Here I am laying out the various pieces I cut and gluing them together.
The sub-roadbed was held in place by risers (vertical blocks of wood) and everything was checked for level and square before the risers were screwed to the benchwork.
I used a long, straight piece of wood to check for level across bigger ranges than what my level allowed.
When all was final, the sub-roadbed was screwed to the block using brass angle brackets.