The 1.5 ohm 510 LR cisco atomizer is still going strong and you have to be careful with how you push the bottle with these 510 atomizers plugged in. With a 306 cisco, I only need to push the bottle a little and I would see juice in the holes but with these 510's I have to push hard to see the juice in the holes. Once I see the juice in the holes, I then draw hard and after I blow out the smoke I can see the unused juice coming back down to fill up the reservoir cup in great amounts.
Therefore with these 510 LR Cisco's, I have to push the bottle a little bit and to forget about filling up the holes because the 510's are structured differently. It just shows that the juice flows better with the 510 and less efficient with the 306. So far I am satisfied with the 510, it just needs to be more consistent but I think I'm just doing something wrong.
Edit: Actually, I forgot that I replugged the o-ring in the cap to see if that was the problem with the juice flow and now I don't know if the 510 is making the juice flow better or the replacement of the o-ring. I'm stumped.