I have decided to stay with the kr8080d that I got from smoketip 2weeks ago for a while. But I need some advice. Smoketip only sells the 16mg cartomizers and there are times that I feel like I need something higher as I am still smoking around 6 anologs a day to get what I seem to be missing. Does anyone know who sells the prefilled 24mg or what do I need buy to do the fills with 24mg myself? Any help would be appreciated and please tell me exactly what I need to buy as I am still very new to this. Also I don't want to try refilling my emptys yet, I just want to buy some to see if the 24mg will help. Thank you to anyone who has any ideas that will help