I know this is subjective, but I also know there are different styles of 510 attys. I am looking for some new ones and was wondering if anyone has any links to what they consider the best 510 atty for vapor production. The ones I have never were that great, I think they are SLB or something, but my supplier doesnt even offer 510 any longer, so I was looking for some where new to buy... I also got a 5v usb passthru and 2 of my attys are spotty on it and only work part of the time, while one works mostly all the time, but never that great... I need something compatible with the passthru and something that gives good vapor. Thanks in advance!