There is not a 510 Atty on the market that will not leak if you put to much liquid in it because of how there engineered, made and put together, even with a sealed 510 center pin they will leak out of the air holes on the threads, so I don't want to hear any 510 Atty's don't leak, that's just phooey,,,,,,,But drip the right amount and it wont leak, or use a drip shield with a sealed connector,,,,,,357 is clearly the winner in my eyes and I've tried them all. However the i06 and others are OK Atty's too. If you cant afford to pay to play with the 357 you can buy the ss wool like mesh and strip apart a cheaper 510 Atty, remove the bridge and metal they use inside so all you have left is the two wires from the connector going to the ceramic cup with the coil in it, then twist a Small piece of the special wool like mesh and put a piece in between the two wires under the cup and up to the side of the cup, then take another small piece of the special wool like mesh and wrap it around the ceramic cup, install the tube back on and poof you have a home made 357 style Atty. ( If you want to take the time to do this like I do ) Takes me but 10min max to make one and they rock, I buy $4 LR Atty's and make my own home made 357 style from these, using a special Wool like mesh from here
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Lustersheen Metal Wool Product, Cleaning Polishing items in SteelWool-biz store on eBay!
They also sell a few different products that you can experiment with if you can afford to pay to play and experiment like I did
5-10min to make a cheap 510 into a decent mesh filled Atty. Only difference is the special coil that Cisco uses which in my opinion is an excellent coil and the cheaper Atty's don't have these coils, the Cisco coil is the finest made in my opinion and what makes a 357 a 357 besides the special mesh used internally. I love my Home made Attys I reconstruct, and there all most a 357 accept for that super Cisco coil.
Cisco is a smart dude for not revealing his sources on his coils too, I know I wouldn't if I where selling the same so more power to Cisco & Hanna for putting out a superior Atty to others
I have 4 HH-357's that turn 1yr old in Sept, and haven't had any that lasted less then 7 months myself ( Some people have had them last less but its all in how you vape and maintain them ) So you have to take in acct how long the 357 last as well when you compare to other Atty's, if a 357 last you even only 3 months it's not a bad deal thats approx $7 per month to run it, and if you get 6 months out of one its like $3.6 per month to run it, so in reality its a pretty good deal for the massive flavor and vapor you get from a HH-357
The best thing you can do is preserve your wick in an Atty by keeping it soaked well, sooner or later the wick is the weak link in an Atty, I have 357's that the coil still heats up like a beast but the wicks are just shot ( 1YR OLD ). Keep your wicks wet guys it's key to the longevity of any Atty, especially the 357
It's all about what works for = YOU
and whatever works BEST for YOU is what you should use