Did a little surfing to learn about welding cast iron and came across a place called Lock-N-Stitch where they repair cracks in cast iron with threaded plugs. They claim the repair is as strong as the original piece and before and after photos of their work show you can't tell the piece has been repaired. Anyone familiar with this company? I also read horror stories on trying to weld cast, any comments on that? I certainly wouldn't attempt the welding myself, but it seems even professionals have troubles?