Just when I think I've got TIG figured out I try something new and get my arss kicked.
Building aprons and rad support for this current project and this is V2.0 trying to weld in this flange. Same thing happened the first time- warped the crap out of the panel. This time I've tried TIGing the flange on before cutting out the opening hoping the extra material would help keep the panel straight. Sheet metal is 18g. V2.0 flange is 11g vs using 18g on the first one- again trying to stiffen the panel. The flange was tacked down about every 6-8" all the way around before welding. I'm welding about an inch at a time then skipping 6-8" and welding another inch. I'm only using enough heat to make the weld and moving along at a pretty decent pace.
Suggestions??!?!?