Hi Sarah.. Another idea would be to construct a CC board with under dimensioned ribs... with respect to height... and when its taken on crown laminate these same ribs with pre crowned ribs to bring the ribs to the desired dimensions. One places then the underside flange of the rib glued to the soundboard under tension (tho it is already under compression being bent from the soundboard) and the upwards side of the machine crowned <<laminate rib>> under compression. But since wood can handle much more stress along the grain... the darn thing should end up pretty strong. The piece of the rib glued to the soundboard would be bent and tensioned by the soundboard, and held in place by both the compression in both soundboards and the second rib layer. In addition since the second rib layer was machine crowned it would also contribute to supporting downbearing in the sense an RC&S set of ribs do.. Lots of combi board systems available if you first want to try. Pre crowned laminant ribs have already been used.. tho not in the sense above Cheers RicB What I was thinking when I suggested a hybrid board was literally two panels fitted together. Imagine a CC board from, say, the lower treble downwards, ending at a half-rib (split lengthwise, that is). Join that half-rib to the half rib at the edge of a RC/S board for the lower treble and upwards. That would give the longevity of crown and higher sustain in the problem areas, with acoustic coupling that would give the entire board some damping/hysteresis/distortion properties of the CC board, if only by virtue of the fact that vibrations would bleed back and forth across the board joint. It might yield a classic CC sound with most of the benefits of RC/S. Perhaps??? Peace,
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