Can you use the same machine as the one for the steel studs? What about those stud dent pullers? I have seen two types. One is the Studlever by Bill Goos and another kind of looks like a rivet gun that has a round foot to spread the load onto the surrounding sheet metal while the stud is being pulled. Both look like they would have their own special uses, but I'd like to start buying the one that people have found is the most versatile. Thanks guys...