Quick tip since I can't yet start my own threads. If your 510 gives you a throat hit when you drip but not so much when you place the cart onto it, try trimming off ~15% of the cart filler material lengthwise. I've found that stock 510 carts come a bit overfilled and this doesn't give the material enough room to "breathe" so to speak, with the result being that they can seem a bit congested. Once it's wicking like it should, the 510 delivers a monster hit.
Without a doubt, VK carts are MUCH more consistent with regards to throat hit and flavor. I don't find, however, that I am able to refill a cart as many times as some folks suggest without getting the burnt material that becomes apparent. So I refill once, maybe twice and toss em. Fresh cart and battery = bliss, lol! Steve should have called his product the FLAVOR KING, lol!
Not impressed with flavor and throat hit on the Greencig cartomizers at all. They don't taste nearly as good as a VK cart, even with same juice. Just produces a lot of cold weak vapor, IMO.
SMILIN STEVE, you sell a ton of great juices. Are you going to be selling blanks anytime soon???