I was going to tell you in the other post, he (David Russell Young) smoothed his scarf joint with the two pieces joined in just this way, so I copied that method. As for thinning the headstock, he used the same method as in GuitarNut's Gretsch build. I did the same, only not having a bandsaw I used a Japanese pullsaw & chisel (hey, if you've got a bandsaw, you don't want to know
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Dave