Yeah that part about "check power ratings on any part that carries a current" is spot on... I've toasted a board myself from trusting a knockoff battery that looked identical. @paulk42, this is exactly why I always grab the multimeter before installing anything with wires now.

Just make sure it has a TrackPoint, though.

Dude yeah the slide hammer is brutal on big flat panels. I tried doing a 2014 F-150 door that had a nasty crease near the body line and the slide hammer just made it worse. Ended up with this rippled mess that took forever to block out. The stud welder sounds like a game changer for that kind of stuff. How do you keep from pulling too hard and blowing through the metal though? I always feel like I'm gonna punch right through with those things.