Well, my rule is that you gotta know when you can do it and when you'd rather have the guy do it. I had gfci plug die and when I replaced it, It didn't work. I did all the normal tests to figure it out and, well, I was confounded.... Soooo, I thought, I really want a dedicated 110 and 220 circuit for welding and big power tools AND I want a cutover switch for my generator (in prep for my house batteries etc) and, I'd love to meet an electrician that I like who I could hire to rewire my cabin. (it is all 2 wire) So, I hunted around, talked to friends and neighbors and he is coming today. He is doing the simple ones first so I can see what I think... if it works out, this could be a huge leap forward on my projects! I love really good pros when they do stuff... inspiring!