You can use a chop saw, zip blade on a grinder, bandsaw, plasma cutter, etc. Remember that the mark of a true craftsman is thier ability to turn anything that is not perfect into a work of art. With wood once you cut something wrong you throw it in the scrap pile... with steel you can add more metal via the weld and correct for irregularities. You don't have to get the cuts perfect, just close. The weld and aligning closely will take care of everything else. Have fun and relax....