I've got two different tanks and have tried probably 8ish cartos in them. They all perform horribly. I've got them primed correctly, 3 holes punched, taken a lot of medium to heavy dry drags, and they still don't want to feed. They are great on their own but I just can't get the juice to feed through. The holes are definitely big enough and I've tried 50/50's to 100%vg with the same results. Sometimes if I pull very hard it will start to feed for a bit but I shouldn't have to do this. I'm really at a loss of what else I can try. I've done exactly what every tutorial says with no luck. Would a Diver or Killer be better?