More A7 questions

[VolvoHeretic]

How about this for the encloser sound deadening reenforcing? The interior 1/2" sound board is sandwiched inbetween the A7 plywood and 3/4" MDF, bolted together with a rubber washer assembly to totaly isolate the two. I would still use single plane forming plywood on the outside of the curved horn bell with the same technique to reinforce the curved bell since there is no room to add any solid piece of wood to the inside of the bell. ???