I realized you asked YR this question but I do believe I may be able to answer it. If you weld it a little here a little there a little over on this side little over on that side (what is called Skip welding) it will be fine. Even if so I just would have a hard time seeing it get Warped or out of condition just going around the rest of the edges. Others will probably chime in. But my experience comes from many many years of structural welding.