RobF -> RE: Back thickness (Jul. 6 2020 16:49:04)
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I’m not sure I understand the problem from the description, could you post a picture or be a little more specific? Reducing the back thickness is a bit of a last resort move, maybe there are other options, but hard to know without a clearer understanding of what the problem is. Some separation between the back and sides is fine, as long as the liners are well glued. The binding can cover that. But again, the liners have to be well attached. If the liners are loose and this just happened then you might be able to soften the glue with heat and moisture and reclamp. Or heat and soften, pry apart a bit and push some fresh glue in and reclamp. Again, not sure how to answer based on the description. Of course, it could just be that my reading comprehension sucks, lol. But to address the original question, you might have wiggle room for some reduction, based on the wood and its current thickness. For instance, if the back is Rosewood at 2.4mm then knocking it down to 2.2mm is probably OK. Even 2.0mm, but that could be getting a little lightweight, depending on the wood. It’s going to change the sound, though.
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