Ron, My understanding, from a class with Clair Davies at the PA convention a few years ago, was that the beauty of 2 x 6 yellow pine was its particular abilty to bend just enough from the pressure of the pneumatic hoses to give the crown desired. Therefore using yellow pine is critical to his design. Clair was always making improvements, however. You may know more about this than I do. Roger Hayden, RPT
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