Bill----Yeah, a small side grinder with a wafer-wheel would cut the welds if you could fit it in there. I'm talking a real pro grinder like a Metabo, not a Dremel tool which is a toy. But wafer-wheels are dangerous tools, they're prone to binding in the kerf and then jumping back and biting you. I've seen some Boilermakers get cut REAL BAD with wafer wheels; down to the BONE baby, ligements sprung back like broken rubber bands, time to call Horowitz and Horowitz or Arnie Rubin; that kind of cut. I'd stick to the sawzall, MUCH safer tool.