I had the cardboard to trace this out tonight, but need to buy some plywood to do it right. I'd like it to be one piece if possible. Putting this in place will allow me to create the rip rap embankment on the right, the seawall on the left, and the outlet of the under track culvert. Then I'll pour the plaster bed, paint it, and it'll be ready for casting resin. While I used pourable water for other places on the layout, this ledge will be something that might collect a soda can or two in an op session, I want it to be definitely non-soft!