Ok ths is really weird. I just noticed this while passig my stash tray and looking down. Looking down through the drip tips on my T3 mini's there appears to be difference. See below.



It appears the internal stem is further down on a few. Of the 9 I have 2 look like the the one on the left (and second pic) and the rest look like the one on the right (and third pic). Only similar thing I could find with those two is they are both smoke color tanks.



It appears the internal stem is further down on a few. Of the 9 I have 2 look like the the one on the left (and second pic) and the rest look like the one on the right (and third pic). Only similar thing I could find with those two is they are both smoke color tanks.