Just curious, but when you say dry burning, and popping a chimney off. What exactly are you rebuilding? If it is a kanger tank, I would recomend being careful with dry burning, they can get too hot and melt the rubber insulators thus giving a horrible burnt plastic taste. Personally I use cotton to rewick all my tanks, there is a debate over organic vs non-organic which you can decide for yourself. I have used both and the organic does seem a bit easier to work with, less clumps in and fluffier as well. If you are using kangers they are fairly easy to strip out and rebuild, temcoindustrialpower.com is a great place to get wire at cheap prices.