Need input on how to sample all of my new juices on my Ego-C Twist. I don't want to shell out a lot of $$$ just to try out all these flavors. Help!!! 
I would recommend picking up a couple of basic Joyetech 510 atomizers for your Twist. Mine taste better than any of the others I have (although I do have some Boges coming in that I haven't tried yet). When they are clean and dry, screw one of them onto your twist and directly drip 3-5 drops of some e-liquid into it (to prime and fill it). After you've had maybe 6-8 puffs, top it off with 2-3 more drops of juice. You'll be able to tell when you've vaped most of the juice. At that point, I personally just go to a new juice (if I'm sampling). I find the flavor of the new juice will come right through just fine on the first or second puff. So, to me at least, I see no reason to fuss with cleaning or swapping out an atomizer just to try a new flavor (I place a high value on simplicity).
No, there's no need for any cartridge. The cartridge thing has largely gone the way of the dodo bird. Like Cuando said, you just need a drip tip.So Dayworks - I don't need a cartridge with the Joyetech 510 atomizer? And if not, what kind of tip do I need for the atty?
I would recommend just pulling the tip out to add some new juice directly into the atty. That'll do two things: 1. It will insure that all the juice you add will actually make it to the atomizer and, 2. It will for the most part keep different flavors from mingling in the drip tip.
I agree with dean.. I try new liquids on a Twist with an atomizer.. Just a couple drops cranked all the way up to 4.8 volts gives a good idea of what its goign to be like.. Then if i like it.. (Being a 6ML-9ML a day vaper) ill fill up a 1.5 OHM SmokeTech SingleCoilTank (3ML) and get started.. If i dont like it.. I let my wife try it.. if she doesnt like it.. off to the trash it goes..
If you are like me and are a chain vaper.. Smoke lower NIC juice so you can vape more..
All of these answers are great! Thank you so much for helping out a newbie!! I think I understand it now and I'm on to ordering so attys......thanks everyone!!!!