Hello and thank you for reading my post. I have a simple weldment of a rolled metal tube with a flat lid. I was able to insert a weld where the flat lid meets the rolled tube. However I can not get a weld bead to insert along the seam of the rolled tube. This tube is very much like a piece of D.O.M. Steel tubing. I attached a zip file of the assembly....please help...its crunch time!!! :-) thank you!