Sorry for starting a new thread, but I'm struggling with this proposition.
I'm building a kinda oddball mandolin that has a centre block to deal with all the string loads, but still has a sound board. Its 3mm spruce. There's nothing solid under the bridge, which I plan to let float rather than glue in place. Should I put a brace under the bridge position?
All discussion of instrument loads seems to focus on dealing with string tension, which shouldn't be an issue for me unless the concept has gone badly wrong (in which case the bridge will be the least of my problems and it will need to be completely rebuilt anyway).
I was thinking on lines of a simple transverse brace tapering to nothing at the ribs.
Jim C
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