Im new at building, and probably shouldnt be, but how else do you learn? I watched several videos and have a good understanding of the process. my first coil was .8 and a little sloppy looking but it worked. the next one i built was .9 (the one im using now) Both coils worked no problem but my battery gets a little warm. Its an istick 30w. My question is what is the safest range (lowest to highest) i can build with this set up. it only gets warm when i chain vape. Thanks.