So i live in Arizona so i thought it would be fun to build a layout with the grand canyon in it. I am thinking of building my table 4' wide and ten feet long with an 18in wide 2 feet deep channel thru it to make the grand canyon. i was thinkin of carving styrafoam for the walls and painting it. Anybody have any better ideas on how to make the sides of the grand canyon or on anything else. Space is no issue i have a six thousand square feet shop.