by Brian Evans » Sat Dec 17, 2016 8:47 am
You could probably laminate a ring of plywood under the cone ledge, to have a plate to locate the sound posts if you go that route. If you go with a baffle ring, it can land right under the ledge, and reinforce it that way. With a top that thick, you could go with no baffling at all inside (my 1935 Model 25 has an open sound box, no baffles). Ultimately the relative height of the edge of the ledge sets all of the geometry of the string path and the neck, so it's quite important. That's a lot of solid maple, if nothing else it's going to be a substantial little puppy! How are you going to bind the edge of the top, with a top that's almost a half inch thick?
From memory, my Model 25 has a 1/4" top, a plain hole with a 1/2" thick ring glued to the top that forms the ledge, and that's it. No other bracing. I don't know how thick the back is, but it's birch plywood.