It has been well documented all over the place that the new attys for the 510's being sold now are slightly larger than the old ones. With this we get the aweful problem of leaking and cartridges falling out. Well, after almost 2 weeks with my new attys, I have a solution. I still had about 12 old 901 flat tip cartridges laying around. Well, guess what???? They fit perfectly. They are a touch snug to put into place the first time or two, but they seat nicely after that. Also the new atty's are producing much more vapor for me and definately have outlasted a few of my older attys. I have also seen absolutely NO decline in vapor after 2 weeks constant vaping and no cleaning to speak of. I usually clean my atty's every week, but decided not to clean my first one of these to test out the longevity. So far they are great. Get yourself a few 901 cartridges and try that before you give up hope on these new atty's.
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