I'm using the KR808 more and more. The 510 is starting to gather dust. I never thought I'd say that. I'm getting better about refilling the KR808 carts. Had some long drives recently (150 milers) and such a delight not to have to constantly top off or change batteries. What a delight!! Plus, I don't have to drag along a truckload of stuff. A cig, an extra battery, and a couple carts.
Wicking is indeed the downfall of the 510. Yeah, I've done the straw mod and the pyramid tea bag. They tided me over for a bit but ultimately let me down. I don't want to mess with it, really. The engineering should be easy. There's no excuse for a battery that lasts 45 minutes.
I can't wait to try some Green Cig carts when they come in all filled up with NHaler juice already. I'm so spoiled rotten by NHaler juice that I really am not that into any of the Dekang juices that are preloaded in the carts so I look forward to refilling them all.