I know I shouldn't double post but I should of replied within my first topic reply. I def want cartos n fill. I'm about a 15 a day smoker I know cartos can't be mixed (juices) but I'm unsure of how many blanks to get I'm kinda impressed with the bloogs but unsure if they'll fit on a 3.7 silver bullet. I'm not ready for 6v that's why cartos fill that void. I'm also into flavor n nice smoke. I hope I'm on the right track guys correct me if I'm wrong. Cheers
You can double post.
One of the main reasons I use my 510 (other than short trips) is because of the versatility. I can use cartos, cartridge and atty or drip. This is an excellent way to test juices instead of filling up a whole cartomizer with a juice you may hate. It's hard, but not impossible to remove the juice from a carto once it's filled.
As to how many- cartomizers can be refilled many times but they are disposable and don't last forever. I'd start out with at least two boxes (10).