My journey into vaping is leading me to low res attys. I'm waiting for my 510s to come in the mail for my Silver Bullet (3.7V). I'm hearing great reviews on the Cisco LR 306. My dumb noob question is, do 306's screw into the threads of a 510 or do I need to buy an adapter? Are there any great differences in dimensions, etc. Any immediate feedback on Cisco LR 306's you can share!! Thanks for making vaping informative and fun.