Headstock drilling

Beauty, thanks.

I reckon the PRS looks like the one I need.

I also grabbed the Les Paul 1:1 for the bridge.

Double check the scale length before drilling any bridge holes. If it's the same (24.75"), reference the 22nd fret for position, not the end of the board. If it's not the same, then ignore the Les Paul 1:1 totally.

I'd be tempted to fit the neck, hold the stop tailpiece down with a clamp at each end, fit strings (or at least the two Es), then slide the bridge into place with a small block of wood for height. Then position it so that everything lines up and intonates. Mark the mounting hole positions and then drill the mounting holes out.

Same scale, different body.

I will be checking the spacing of the holes on the template against my hardware.

I will be fitting the neck to work out the position of the template.

I will also be using the 2 outside strings to work out the centring of the template.