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Private member DiscussionRepair and Restoration

Fret levelling: How low is too low?

I finished levelling frets on a mandolin last week, and was surprised that the frets with the worst divots worked down to .020" Had I known that I'd go that low, I might have replaced them, but it's hard to measure divot height, especially those caused by thin strings. I haven't seen much discussion on standards for fret height or guidelines to know at what point should I switch from levelling to replacement. What standards are peop…

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I’ve found for most guitar players anything below .030” starts to get into refret territory. Might be different for mandolins though, I don’t work on many of those. I have a client that loves the fret…
Private member DiscussionAcoustic Repair

Fretboard hump above fret #12

Is it a common problem for the fretboard on an acoustic to develop a hump around Fret #12 and higher, where the neck meets the body? If so, what is the cause, and is there something that can be done, or avoided, during the initial build process? I have two quality Zager brand guitars that both have the problem, with the problem being worse on the cheaper model. I am a newbie to fret dressing and lowering, so I first tried adjusting the…

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Thanks for a great answer. I am a retired sonar engineer, so your explanation makes perfect sense to me. I figured it had to be almost an endemic problem with acoustic guitars.Next question: Can you r…
Private member DiscussionTools and Jigs

Birkonium Fret Press Cauls

Just got these and they are really neat. If you like to press frets and do compound or imperfect radius fretboards, these are the ticket.

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I designed that caul set and had Andy make a few sets for our shop and for students of our fretting classes. After being frustrated with the gaps between “standard spec” cauls vs real world variations…