Crowning methods, was soundboards.

[Ron Nossaman]

>I can't vouch for past methods (especially during the American Aeolian 
>years), but current M&H production employs rib crowning (the Boston PTG 
>chapter had a tour of the M&H factory this Fall; their head engineer Bruce 
>Clark was the one leading the tour and I asked very specifically about 
>this methodology).
>Patrick

Current production not only uses crowned ribs, they use 5 radii, tighter in 
the treble.

Ron N