Thanks for the feedback/response. i ordered some V4life carts, They fit, and i liked that i could order blanks in different colors. I did get the delrin drip tip. Couldn't figure out what to do with it at first. I didn't realize the caps at the end of the cartos were caps, and popped off. Yes, not for dripping, while a little feminine, i like them, they make it easier to refill and i think they may make for an easier drag.