You can give SM $44.12 for that nut and saddle vice, which BTW works great but I sold mine, or get a much more versatile vise on Amazon for $27.99. Unbolt the jaws, take them to a sander, put an angle on the top like the SM vise. Quick release and opens to 4", plus light weight, which matters to old guys like me. Bolt it to a piece of wood with a cleat on the bottom and use it in another vise like you normally would the SM one. Search for a Bora Drill Press Vise on Amazon Smile.
I brought that roller skate into the 21st century by throwing away the springs and the clip and adding a rubber band. Ken, I bought the tool before I had a mill. You could mill it out of alumnum in no time at all and I bet you'd like it.
So "great minds think alike.. or fools rarely differ" its got to be one or the otherKen,
Same with me. My nuts and saddles are mostly black micarta, so I also run them in lengths. I keep a stock of lengths plus or minus a few 10ths of a mm to accommodate slight variations in the slot between the fretboard and headcap.
nut files. I used welding nozzle cleaners initially but so much easier with the correct files.
but it the rounding the top.
So "great minds think alike.. or fools rarely differ" its got to be one or the other