Is like refilling a standard carto? I have seen many methods, favorite being the condom fill method (Putting juice in the cap and pushing battery end of cart onto it). But does that one work for the 510 cartos?
comparing the condom fill method between a 510 and an 808 style cartomizer I find the 510 has one built in problem....because of the male thread design it is impossible to get all the juice from the condom into the cartomizer.....and, since you can't get that left over juice back into the dropper bottle and you can't stick the condom back in your pocket with juice in it......you have a problem......
Condom method works, but I plan on picking up a syringe to use when I am at home. Seems like it would waste a little less juice (not much wasted with condom, but a little). I'll post again if I get around to that today and let you know which I like better.
If you get a syringe, get a "blunt". Suppliers have them.
I'm not sure, but a nic-stick injury is probably not good for you.