If your going to cut the metal, tin snips will also do the job.
Far cleaner, safer, less tool investment, ect.
You would be surprised what a good pair of tin snips will cut. I can even cut the interior skin steel.
For anyone that doesn't know, tin snips are color coded for angle of cut. Green are left hand, red are right hand, and yellow are strait cut.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization