This is a fingerboard extension I'm making for a Romantic Era French guitar.  The owner was feeling limited by the range with only 17 frets.  We obviously didn't want to permanently alter the guitar so I made an extention that is held in place by magnets.  Very easy to remove and he can now get to a high c.

 here is the finished part.

here is the finished part.

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 here are the rare earth magnets and you can see the metal inlaid into the extension.

here are the rare earth magnets and you can see the metal inlaid into the extension.