Gibson Les Paul Custom.
It was my dad's. I was very young (still in high school), and very into guitar tech work. I put so many pickups in the guitar for him, because it sounded like such garbage. Pure mud, no matter what.
Finally, he said screw it. I want you to put P90s in. They sound good in anything, and no humbucker sounds as good as they do. So I did. I did a nice and neat job, removing as little wood as possible. In the end, I just had to take a small amount off the pickup ring mounting ears.
They sounded the best out of everything, but still muddy. He played the guitar that way for many years. He passed away. I got the guitar.
I finally learn, over a decade after putting the P90s in, that many Gibsons of that era came with 100K pots. I knew nothing about the pots at the time. I check. Sure enough: 100K pots. D'oh!
I pull the original wiring harness as intact as I can, and put in brand new standard Gibson Les Paul wiring. Voila. It sounds killer. But the guitar still looks odd, as a Black Beauty with P90s and goof rings. It's kind of a shame, and these guitars of this era are shooting up in price. There is still enough wood left for the original pickup rings to just barely hold on, at least enough to test out the original Tim Shaws. So I put them in and test them through an amp. And wouldn't ya know it; they sound heavenly.
I decide I must restore the guitar.
The original pickup rings need to be replaced, as they are cracked and otherwise just worn out. It takes me a few years to track down the right ones, with screws and all.
I track down the right pick guard. The original and its bracket had gone missing. I am still looking for an original era-correct bracket and screws...as well as the Posi-Lok ("diamond") strap buttons. The guitar had Schaller strap locks put on it a long time ago; the Posi-Loks are long gone.
I track down the right type of chainsaw case for it. The one it came in (though not original) I had traded off with another Les Paul back when I hated the chainsaw cases (now I like them).
But, the hard part: the reconstructive surgery. I wanted it to be absolutely seamless. I made custom routing templates for everything. My first step was to completely rout away the remaining pickup ring mounting ears, all the way down to the bottoms of the cavities. This left me with simple rectangle pickup cavities, so I could easily and seamlessly rebuild the cavities as they were originally. I laminated mahogany and maple, tall enough to cut "towers" out of to replace the missing ring mounting ears. I glued the towers in, using custom jigs to hold them in properly as the glue dried. I leveled them with the top of the guitar, carefully using a chisel and sandpaper with custom made sanding blocks. I routed again, using a standard humbucker template, all the way down to the bottom of the cavities. I mocked up the new rings, and masked right up to them, where there was already a depression in the lacquer from the original rings. I sprayed black nitro lacquer, then clear. Blended it all in nicely.
The end. Well, almost. I'm still searching for that pickguard bracket and screws, and the Posi-Loks.
In the end, it was a dead perfect job. You can't tell the guitar isn't totally stock. But it was a whole ton of work over a period of 20 years, when all the guitar ever needed was some 500K pots.