Hi everyone I wanted to get your opinons on changing a rear vent stove to a top vent. I just bought an old fisher that is a rear vent and it would work better if it was a top vent. Has anyone been successful welding the original vent shut or does the weld constantly break and is it always an issue. I know a good machinist/welder but I don't want to proceed if its going to be impossible to seal up the original vent hole. Thanks