Free: Contests & Raffles.
YOU CAN BRING IT OVER SOMETIME AND I COULD HELP YOU. I DON'T KNOW HOW MUCH I WOULD HEAT THE BARREL.
Carlsons makes a choke tube wrench that goes inside the choke and it expands outward. This is the one I use so I never have the stripped notches. It might be worth a try because it grips internally, and not at the very end. http://www.choketube.com/accessories-product-details.php?Choke-Wrenches&mf=350