Well, if you are going the welding route, just be sure to keep the current on 1 not 2 (if you have a welder that gets hotter with the flip of a switch). I kept mine on 2 one time and damn near burnt through the kettle. Also the wire speed was 3 for me. Worked out well. The larger vent route though seems pretty cool. Sad that someone would paint a yellow green and think that was a good idea. It's nice to see you tackling a large project. Good luck.