I am getting bored with just the standard tanks and cartos... I want to get into rebuildables and such, and understanding how many wraps gives you what ohms and such... And what the recommended size of kanthal I should use. I don't want to build anything dual coil yet or try to sub ohm. I just want to know some general stuff about rebuildables and a cheap rebuildable (under$15-$20) and where to get it from because I am on a budget. Thanks in advance. 