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Old 11-21-2019, 07:52 AM
redir redir is offline
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Join Date: Aug 2011
Location: Mountains of Virginia
Posts: 7,657
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FWIW I know a lot of luthiers do rub joints with HHG on tops and maybe even backs but the only time I had a center seam fail was when I did that method. I always clamp the joint now. In fact when I clamp it I also use heat so the HHG doesn't even come close to jelling up and the two halves come together tightly.

Done right the center seam should be totally invisible. If you see what looks like a grain line at the glue joint then it's too thick and will probably come apart under some stress.
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