The build has begun this will be the interior structure of the speakers. They will be inside a constraint layer composed of roofing felt. Then an exterior plywood structure will be built around the interior structure. The bracing will be significant and their will be an 3" port. WinISD model Box notes was used to compute the interior the bracing is more Cuts were made with a circular saw connected to a shop vac to capture the nasty dust. Nicely stacked and cut. Clamps Glue Emerson tools straight edge Gluing is being done on the structure now.