I picked up a Subtank mini recently, and I really like it. So far I've been using the .5 occ coils I purchased w/ it. They've been great. I wanted to try to get into building my own coils for the RBA deck, but have never built them before. I recently bought a package of the Kanger premade coils for it just because of the ease of use, I figure. Came w/ 20 coils and cotton. Should I still be testing these w/ an ohm meter before use, or are they good to go?