I wish I knew the difference between a new atomizer and an old one. I have eight atomizers, we've used five, the first two were ordered as a starter kit and one of them seemed "normal" but the other has a metal clip around the wick fibers under the bridge and it's never produced more than a wisp of vapor no matter what I've tried.
My wife used that atomizer for the first two weeks that we vaped and I thought she was just doing it wrong, it really screwed up her
vaping experience. The other atomizer that came in that starter kit worked well after I accidentally flooded it... until the fibers started melting/burning/whatever it is they do and I ended up pulling them all out. Both of the first two atomizers have the wide brass band and if the second two had performed like the first two I'd be back to analogs by now.
Happily the second two atomizers I bought were significantly better than the first two. My wife has been using one of them for about ten days, gets great vapor and is finally very happy with
vaping. I think I just overworked the one I was using from the second starter kit because after about a week it started to get a little wonky.
I received a second batch of four atomizers this past Saturday, I've only tried one of them but right out of the box that thing has been a fog machine. I took it outside a few minutes ago to show it to the guy who mows our lawn and the blasted thing wimped out on me. Oh, it gave out some vapor, but nothing like the clouds it gives out inside. Of course I was using a standard battery instead of my USB passthru and I was outdoors in bright sunshine, so who knows. It's doing fine inside again.
All that to say: order some more atomizers. The 510 will perform with the right combination of atomizer and power source, it's only that some of us are having some real hit-or-miss issues with atomizers right now, I think... maybe.