You might try fluxomizers or clearomizers with your 510. I love them. Filling them is a bit of a pain (I use a syringe with a blunt metal needle, but you can move the white insert over a bit to the side and drip the juice into the side if you want). I got them for my 510 and fell in love, so I ordered the XL ones for my ego batteries. They aren't very expensive and I find that I get great taste and lots of vapor from them. I use a long plastic drip-tip with them, they include a drip tip for each pack of 5 but it's too small for me