zimguide is a PH - I think - in Zimbabwe (this from other posts on other threads), so he's 'hunting' Africa, and any resale value will likely be enhanced there for it's handiness. I can understand his desire to make these changes. His criteria is for a working tool rather than a client hunting rifle.
Well, ok then. I'll quit with the "why would you" dumb remarks & answer the question:
1. Heat the band & remove the set screw.
2. Slide band forward until it is loose on the bbl.
3. Wrap masking tape around bbl & slide band up on it to protect the bbl finish.
4. Cut a slot on each side w/dremel & remove the band in 2 pieces.
5. Touch-up the bbl with cold-blue & you're done.
This leaves the front sight where it is, but destroys the band. The whole "front sight remove / install" thing is where most home-gunsmiths will get into trouble. The above procedure you should be able to do yourself with a steady hand. FWIW....