Grats!!! Nice shop too - cheap shipping and good prices. I buy most of my 510 hardware there or at Liberty-Flights.com
I recommend you try Boge cartomizers with your favorite thinner juices. (I use 20% or less VG juices and avoid any that leave a lot of sediment). I would recommend learning on the standard resistance (won't singe as easily as you learn to sense when more juice is needed) and then if you want you could use the hotter 2.0 LR ones (which also use battery charge faster). Boge are the most popular cartos on 510-threaded devices. I can get 1.5 weeks or more use out of one with thin clear juices (sediemnt and higher VG can make a carto get sluggish faster). There are lots of other kinds of cartos too, some good and some bad, some stuffing and some reservoir cartos that need a syringe to fill. I like to use them for my favorite juices - no atomizer to clean, keeps my flavors separate, provides a pretty consistent
vaping experience.
---
How I fill a cartomizer (Vapor4Life for KR8 or Boge 510 for 510 which are all soft-cap w/ no inner seals and defined central air channel)
I use thin (20% or less VG) liquid or Vapor4Life WOW liquids, preferably clear liquids w/ no sediment
Filling a blank carto - I pop off the soft cap (unbent paperclip carefully in the mouth hole, not catching any wires or stuffing!). I hold some tissue against the threaded end hole. I tilt the carto and slowly drip 18 drops onto the inner wall of the carto so it slides down into the stuffing while I rotate the carto. Then I wait 15 seconds or so then I drip however many more drops the stuffing wants to soak up. Then I do clean-up. If it is leaking, I clean that up. Then I tilt the open end down into the tissue and puff hard a few times into the threaded end to clear any juice out of the central air channel (I want to see light through there). If it looks too wet above the stuffing, I gently touch a bit of tissue to the stuffing (otherwise that liquid will be gurgling or spitting in my mouth). Then since this was a fresh fill of a blank, I now let it settle. I lay the carto on different sides for 15-20 minutes. Then it should be ready to vape. If you use thicker juices than me, then you may need to let it settle longer.
As I am
vaping - if the vapor gets a bit light or a bit dry or tastes bit off or the carto is getting unusually warm, I will take the carto off the battery, open it, add 6-8 drops or whatever it seems to want (I will either hold a bit of tissue against the threaded end hole just in case, or skimp on how many drops I add to make sure I avoid drips if I have no tissue). I check to make sure the threaded end is dry, give it a couple of puffs into the threaded end to make sure the air channel is clear, and continue to vape.
Note - it is easy for me to "open" my main cartos for adding juice because I replace the white end cap with a plastic or delrin drip tip (I get them at LiteCigUSA.net). So I can easily pull that out with my fingers when I add juice and it keeps my lips cool if the carto is hot.