Cutting Fret Slots following curved surface

It's hard to tell from the picture, but I'm guessing you're around 132 wide on the slot That's ~ 031, and the blades for fret slotting are

Fret Options · The dimensions posted for each fretwire are the most accurate indication of size · The actual dimensions of the fretwire we receive may vary

fret slot saw A slot width of 023 is recommended for this fret wire, but somewhat wider may work if you use glue to set the frets in Be sure to measure the width, height

fret slot width This has mm crown height and mm crown width which will allow it to be dressed level down to a uniform height of around mm on frets 1 to 24