I recently bought a few drip tips, a couple short ones, a regular one and a silver one. My favorite so far is 3.7V with a LR atty and a short tip, seems to make the most amount of vapor. I used a regular atty and longer tip on my 5v, but the regular tips with the wide mouth seem to cause more air sucking. With the LR atty and the short one, the atty gets really hot, so I have to be careful, but right now, that's my favorite. I will have to try putting the short tip on some carts and see how that goes.