I just turned on a friend of mine to vaping last week. He's super into it already, quit smoking completely and loves it. He's very motivated to start building coils, and because of his background in art and design, he's really interested in it. I thought it would be fun for both of us to learn this together. I've been shopping online for some tools...I got a vice off ebay and some typical building supplies. What I need to know is what wire to buy. We plan to experiment with all kinds of builds with different kinds of wire. What are the most used wire gauges for starting out?