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Discussion Starter #1
Hardly a tutorial, but that thread title certainly looks impressive.

I changed the tuners on my Epi. Casino Coupe using the hand tools below to enlarge the headstock holes to 3/8" .

Step bit in a tap handle, rat tail file and paraffin wax.

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The holes ONLY needed to be enlarged from the back side of the headstock. The step bit worked very well...much like a tapered reamer (which I don't own). Many thanks to my friend @Scotty for the bit and for all of his support and encouragement via PMs.

A few gentle passes of the rat tail file were need to remove the final 0.0001457" of the internal circumference as the fit of the 3/8" hole was just too tight for my liking.

The last item was the wax. A tiny amount just to make the tuner slide in with ease. Probably not needed.

I hear someone giggling.
Hey, this worked and it was virtually a stress-free approach for the guitar and for me.
 

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Discussion Starter #4
Good tip putting the step bit into the tap handle. Thanks.
This post made starting the thread totally worth it.
I totally realize the thread isn't all that exciting/amazing. However, I'm pleased if at least one person benefits

I have a tapered reamer, and it is every bit as invaluable a tool as a step bit, I have to say. Invest in one.
I can imagine how often you might use a tapered reamer with all the effects enclosures alone.
 

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I have a tapered reamer, and it is every bit as invaluable a tool as a step bit, I have to say. Invest in one.
Where do you find a decent one for a decent price?

I need to replace a bridge on a Yamaha acoustic but the bridge I bought - the holes aren’t drilled.

Nathan
 

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1,167 Posts
Thank you. I want to upgrade the tuners on an old peavey and I know that using a drill bit is asking for trouble and I’m not buying a $90 tool, at least not now.
 
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