Porta power awesomeness

I too, have one of the Harbor Freight Porta-Power Tools. I actually bought it, because of a fair size dent in the left rear fender of my '07 Charger R/T, only, the way the body is built on that one, I can't see where I could put the base of the Porta-Power against, that would be stable enough, to push against. I have used them, in past years, but cars were built a lot different back then.