It seems Joye has changed up the 510 atomizers a bit. I have 2 sets of 5 from 2 different suppliers (TW and Litecig) that are decidedly different than the ones I had previously. The threads are a bit shorter, the carts supplied have rounded mouthpiece end, the draw is lighter, and the vapour is not as thick, they even taste weaker now. I mean, they work, but they're not the same. Anyone else noticed this? I even have 2 in one set that are 1/2 mm shorter than the other 3. Have Joye changed manufacturing plants perhaps?