I'm new to ecigs and ordered blu (which I am NOT happy with). More than half of the cartomizers do not work. I also ordered e-juice (not from blu). I am looking for any advice on where to purchase replacement cartomizers that will fit my blu batteries. Also, can I order atomizers and cartridges instead of cartomizers? If so, do I want to do that? Will a separate atomizer give me more vape? Are cartridges easier to refil than cartomizers? I've heard Joye 510 cartomizers fit the blu battery. Also heard volcano fits. I have just started with the ecigs so I appreciate any and all advice/opinions! Thanks!