I've been up every night for the past few days until the wee hours of the morning building coils. Picked up an RSST, IGO L, and a Patriot Clone and have tried my hand on all. So far, had great results, cotton's pretty harsh when it burns though lol. Rebuilt a couple of my Protank 2 heads and they were miles above the stock ones IMO. Got a few with 28g, and 30g. Personally I like the 28g, but kinda hard to wrap it and get my desired ohm reading to the PT. On the rebuildables, definitely didn't like 30g. Will probably play around some more until I run out of all my wire lol. Personally, I only desire the tanks for on the go, while I like my RSST and Drippers at home.