This woulda been my second plan. But because of the way a larger bit can grab ebony, I feared for my life. lol
Of course cutting the ledge first is trivial, this was all about cutting it after the main hole had been drilled. @mattharris75 won instantly. BTW, I'm not totally done yet, I'm going to shave the face down ever so slightly to flush the face and washers. I'm definitely in the home stretch now. I can tell because my mind is all over two other builds while I'm doing this final bits.
@ScottR You prodded me with your single coil / p90 comment. I started looking at single coils, but ended up getting a stacked p90 to use in the bridge, so it can be run stacked or split.