Thanks to all for the suggestions. I'd like to share what I did to fix the problem. I used a heat gun to soften the epoxy, allowing me to remove the wire without damaging the wood (worked in a minute too). I then cut out the grooved elevator portion and sanded it flat. A balsa stick was then glued in its place, and then sanded to restore the original bevel. Everything turned out really smooth, ending the need to build a new elevator, as long as I don't screw it up again.