bevel cuts for roof.

[moretroubleagain]

I apologize if I can't find it. And since there are a host of boxes at custom sizes. This might help those trying to deduce that angle for the plywood bevel when joining the panels for less "patch" work. I'm mocking with some foam core pieces.
http://www.woodweb.com/knowledge_base/Bevel_Cuts_for_SlopeSided_Boxes.html


and another site http://jansson.us/jcompound.html