I use a syringe to fill all my cartos and find its hands down the easies and quickest way to fill, especially if you use XL cartos or use thicker juices. It ensures they are filled correctly and takes all the guesswork out of filling.
This is a copy and paste I wrote for someone else on how to fill the Ressurectors, but its really for all cartos. Follow these directions exactly and you should have no problems. Just go slow and you won't overfill them. Watch the top of the filler and as soon as you see the juice rise to the top of the filler and it looks "slushy", it's full. It's very easy to do and it's much quicker than other methods bc you don't have to wait for the juice to settle. Just fill, blow lightly out the airhole so you make sure it's clear, wipe the threads well, and vape.
Here ya go:
How to fill a cartomizer with a syringe:
"All you have to do is take the dropper part of the bottle off your juice and fill your syringe with 2ml for a new carto. Take the rubber tip off the carto and carefully insert the needle down the side pushing against the metal. DO NOT go thru the filler because it will move it and you could potentially break a connection and your carto. Slide the needle down the side and go all the way to the bottom. Then slowly start dispensing some juice. Dont dispense it all bc then it won't be evenly distributed. Put alittle in, then take it out and insert the needle in a different spot. I normally do it in 3 spots (in a triangle) I found it distributes the best, but you could just do it in 2, on opposite sides. Make sure the needle is at the bOttom bc then you will not have to wait at all for it to settle. Disperse slowly and you will begin to see the toP of the filler become slushy. It is full then, don't put more. If its a new carto is will def hold 2ml, if your refilling it won't take a lot so pay attention and once it gets alittle slushy stop. While your filling hold a napkin or something under the carto bc if you do it too fast a few drops will come out the battery end. If that happens its only bc you did it too fast and the poly fill didn't absorb quick enough.( that happens to me bc I am impatient and fill it in about 10 sec, so I just hold a paper towel or napkin underneath.) wipe up the drops and put the rubber cap back on the carto. Then put the carto between your hands and rub back and forth spinning the carto quickly. This will insure the liquid is evenly distributed in case you put too much on one side from the syringe.
Now you have a perfectly filled ressurector that is ready to be used right away!"
As for drip tips, I prefer the Big-Belly Drip tips. Hoosier sells them for $1.99. They fit snug so they wont wiggle or fall of when you PVs in your pocket. They come in a variety of colors and are comfotable on your lips. They are also awesome for if you ever decide to use a carto tank, bc their slightly fatter than the carto so they stop the tank from being able to slide up