I used a spindle on a hand drill to take off most of the "meat" but for the finer work I used this little file/rasp combo.

I hand-drew an arc at the base of the volute and am shaping it by eye. I took the opportunity to fine-tune the lines on the

The nut width is still a touch proud but it and the neck profile at the first fret are getting there. The headstock is still thicker than it needs to be though but I'm confident it'll all work out.

Not bad for less than an hours' work. Mahogany sands so easily! Maybe too easily though - I believe I sanded about 1/32" inside the line on one side.