Re: Northfield A Mandolin?
For the sake of clarity, they are called apertures. The shape and size varies from maker to maker and instrument to instrument.
It would be cool to hear from actual makers.
Once upon a time, I had a cool conversation with Roger Siminoff, who went into some detail about the size and shape of the aperture, and how that all worked out.
Billy
Billy Packard
Gilchrist A3, 1993
Stiver Fern, 1990
Weber Fern, 2007
Gibson F4 Hybrid #1, D. Harvey 2009
Gibson 1923 A2
Numerous wonderful guitars
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