Hello, I am trying to find a way of accurate mitring for a 3d shape in wood, to do a cast from in concrete. Best way to describe it is like the pizza hut roof symbol. Is it as simple as to cut the angle on the mitresaw the same as the edge cut? New to this wood-stuff, so technical words escape me! Sorry. Does this make sense? It's the mitring of the upright 4 sections causing problems, as they lean-in to each other