Hi Phil, that would be great but it is not a problem, the vice will still be very useful as it is.
Steve, yes, I suppose I could do what you suggest, the screw is not hardened. The piece that I cut off is about 4" long I could cut flutes in it and case harden it but I don't think that the reward would be worth the effort.
What is the difference between a rotary table and a dividing head? If I make division plates to fit the rotary table surely I will get the best of both worlds. With a 30:1 ratio I will get 12 degrees per turn of the handle, if I use a 3" dial 120 divisions would be spaced at approx. .08" giving me 1/10 degree spacing. I haven't done the maths for division plates but I would think that I could probably get most divisions that I might need.