I recently bought a router and router table in the hopes of making my own boxes with rabbet joints. Of course, realized I have to rip the 1"x8" to 1" x 6 5/8", requiring a table saw. Since ripping with circular will be somewhat tricky, I'm intrigued with the idea of plywood. Any other disadvantages other than weight (will be for medium supers, so shouldn't be too strenuous)? I would paint them to help prevent warping, etc.