Don't skimp on quality punches. The elcheapo stuff you typically find at lowes home depot sears etc will mushroom and can easily damage pin holes. Get quality tool steel punches. Use your cards at walmart for something else.
"Gun control: The theory that a woman found dead in an alley, raped and strangled with her panty hose, is somehow morally superior to a woman explaining to police how her attacker got that fatal bullet wound." — L. Neil Smith
The problem with being stupid is you cannot simply decide to stop doing dumb things...
"I crapped my pants to avoid the draft!!" -Ted Nugent