On 5/23/2012 7:48 AM, Euphonious Thumpe wrote: > Should it not be remembered that the M&H turnbuckle device does not > CREATE crown ( that is done during board construction) but rather is > intended to merely preserve it (in all planes, even if ever so slight) > by preventing "case spread"? It doesn't do that either. When a crowned rib and soundboard assembly, or model, is perimeter supported and loaded in the middle of the rib, the rib ends pull in rather than pushing out. It's not an arch, which anyone could have easily demonstrated at any time in the last hundred years or so exactly as I did by actually trying it instead of sitting around speculating. So the M&H crown retention devise doesn't retain crown. Try it for yourself and see. > Could not the value of the M&H device be simply demonstrated by > temporarily removing one, and making a scientific before/after > analyzation of tone? ( In same RH, temperature, barometric pressure and > etc..) Again, trying it and finding out is apparently too simple when speculation can be nursed along virtually forever. Ron N
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