I remember once using a pair of needle nose pliers to move a nock point back when I first got into working on my own bows. Putting pressure at the right angle pops the nock point open more thus allowing you to move it up and down the string. That seems alot less troublesome than what you are suggesting.
If you manage to get the brass nockset off then I would suggest just serving in a tied-on nockset the next time as it is much easier to relocate without tools.
