When working with a blank body I have found the easiest way to drill for a string through hardtail is to do the math and get your location for the scale you are working with. Use a vix bit to center and locate the mounting screws and screw the ht to the body.
Next use the same size bit as the string holes and use a drill press with a backing board on the body to keep it from splintering out the back.
Remove the bridge before moving to the next step.
To drill the back for string ferrules use a step bit and the depth stop on your press to make perfect ferrule holes.
I use a 1/4-5/16-3/8" bit for for Fender style ferrules.
The step bit will self center on the string holes for perfect alignment.
Test it in a scrap block the same thickness as the body to make sure the ferrule sits flush with the body.
Next use the same size bit as the string holes and use a drill press with a backing board on the body to keep it from splintering out the back.
Remove the bridge before moving to the next step.
To drill the back for string ferrules use a step bit and the depth stop on your press to make perfect ferrule holes.
I use a 1/4-5/16-3/8" bit for for Fender style ferrules.
The step bit will self center on the string holes for perfect alignment.
Test it in a scrap block the same thickness as the body to make sure the ferrule sits flush with the body.
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