Dale said: <The inner rim has an approx 1 1/2 degree bevel cut into the inner rim at the factory. Set a straight edge on it & it becomes apparent. This is precisely the point I'm trying to make. You "prove" the bevel and its orientation by placing a simple 2 dimensional straight edge at some arbitrary point and see a bevel of some sort. Then infer this 2 dimensionality to a 3 dimensional soundboard panel, which is not domed but crowned across the grain(roughly), and variable throughout, because the rib arc lengths vary. Where is this 1.5 deg bevel at the bass end of the board when we beat the panel tail into submission?? Further, the 1.5 deg bevel is not matching the "dome" in a cc board, since a 60' or even 40' radius board would be meeting the rim at less than 1 deg, depending on the length of the rib. This means, either way, flat or rastened, even if rastened perfectly, localized stress is added to the panel edge at gluedown. Jim Ialeggio -- Jim Ialeggio jim at grandpianosolutions.com 978 425-9026 Shirley Center, MA
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