Yeah, this. The old guy on the job site knows more "tricks of the trade" than you will pick up in a trade school. Experience is paramount here. It's easy to

Yeah, this. The old guy on the job site knows more "tricks of the trade" than you will pick up in a trade school. Experience is paramount here. It's easy to watch a youtube video on something and think that it looks easy -- until you try it. I can sweat pipes but I'd wager that 10% of them have a pinhole leak when pressurized for the first time. If it was something that I did on a daily basis, over years, I surely would get better at it. Now try doing one through a small opening in the sheetrock, and don't burn anything. When I'm working on stuff in my house, that's when I call a professional because I recognize my limits.