G&H is going to be at the Vintage Cup event. If I were you I would go there and have them look at the gun and see what can be done about your problem. In person is the best way to deal with this type of problem if possible. If they did remove the pits and by doing so make the barrel dangerously thin they may want to get the gun back before anyone is hurt. G&H has been around for many years and has no interest in taking chances for a few dollars.
Perhaps they truly did not know how thin the barrels were when they sold it. If I were them and later found out that work I had done caused a potential time bomb to be created I would rather take the gun back or offer to have the gun barrel lined than turn my back on the issue and hope for the best. Take a drive and go right to the source.
