Quick and easy ring replacement.

On checking my rod over. I have found that I have chiped the front edge of the insert on the butt ring of my rod. should be able to fish with it untill I get a replacement.(Ill just have to keep checking)
So Im wondering is there a easy way to replace the ring without having to completely rewhip the ring.
Is it just a case of using a sharp blade to slice through the whipping and reinsert the new ring. The rod is a AFAW 6+bait and does seem to have a lot of High Build on it. Is it worth heating the blade to get through this??
And apart from rewhiping over this repair is there anything I could use to reseal the cut in original whipping??
I supose its a lazy way but dont fancy having to completely rewhip on the ring (never do a good job) Failing that does anybody now of anybody who can repair rods in the bristol area.
Many thanks for replys of help.