I've been vaping for 6 months, started with and still use an 808 D1 e-cig (after reading many posts I've come to realize this isn't the best one out there but it got me off analogs within one week and I thought I was happy with it until I began reading everyone's posts!) Anyway, my question is where to get a good passthru? I bought one a couple of months ago and it worked for a day or two but seemed weak, then I quit on it for a while and picked it back up 2 weeks later and it will not work at all. Seemed rather cheaply made and flimsy in the first place but I've seen posts about people using passthrus so someone must make a good one that will work for more than a few days? Do you have to buy a PT that is specific to your cartos or are they universal?