To be extra careful we used a level that magnetically attached to the metal legs to show us how straight we needed to weld them. He went around and tacked each leg with two welds just to see if anything would shift, and guess what they all shifted. So, we bend them back into place. Which was super easy. I think this is much better then welding the whole leg into place only to find out it shifted while welding. The tacks definitely help hold it in place while welding.