Smokeyblue,I first tried cartos very early on and had a terrible time,quickly moved to other things;clearos,rebuildables,etc.
Months later I started using unpunched cartos to test flavours and really enjoyed how they performed,so started using carto tanks(my early probs were user error).
I use 5 or 6 different devices through a day and when I look at my current lineup 4 of them are carto tanks.
Decent flavour,vapor and throat hit and reasonable juice use(I was using over 10mls a day with all RBA's)
It's up to you if you want to continue using cartos or try something else for now.
Not sure what I can do.. I know I can not afford to do a thing about it till next month. I can not go over budget here for that.
I wish I could, cuz I would love to play with it.. but I have to wait patiently.
the really bad thing? I have yet to hear from fasttech on my issues with the tank, cartos or juice. Not even the sound of a mini violin! :/