JCinFLA, thanks for the info on the MTL berserker. MTL Mouth to Lung. MTLs are not made nowadays nearly as much as direct to lung, some people are complaining about that.
Probably Berserker MTL or Merlin MTL will be the best modern replacement for the original Protank 1 which was what made me start enjoying vaping to begin with (before that I was using a CE2 Clearomizer pictured below which gave some problems from it being a top-coil silica wicked atty [had to tip and shake them often to help juice up the coil or it'll give burnt hits]).
I re-bought a protank 2 a year ago (and got rid of it right way lol but might get another just as sort of a souvenir and to compare against) just to revisit it and they need to be wicked very exact depending on the juice viscosity vs modern bottom coil RTAs are less problematic.
With a modern RBA, you tuck the ends of the wicks DOWN to the bottom of the build deck and that's where the juice come in from, but the protank has it that they just stay horizontal, so juice just comes in from the sides of the coil instead down under the coil on a modern RBA which makes it less leak-prone. If the wicks tucked down much further though than a modern bottom coil RTA/RBA, then it would be a modern top-coil Genesis RTA which can maybe not wick so well, so I don't get into those (have to maybe shake and tip it to prevent dry hits).
You could get the build right with a Protank but then temperature changes or juice heating up from vaping would thin the juice and it would gurgle and leak rather easy, or would burn the coil if added too much "top wick" to prevent said gurgling and flooding.
But when the Protank was working I did enjoy it despite all that.
The protank feels like a pin hole after getting used to a wide-open direct to lung, 810 drip tip pull of a TFV8, but it's a different MTL style of vaping, and these modern MTL tanks aren't just pinhole air intakes, instead, the chimney is usually also reduced in size. If I put a 510 on the TFV8 and close up the air hole to be small it's not the same vape as a MTL protank.
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Nicotine salt? That sounds like bath salts! lol, but no seriously I will check into that, sound very promising.
I used to vape a protank at 6mg %100VG alcohol-based flavor purchased from ECB plus 'extra flavor" and it felt like nothing but smooth flavor. I would even go up to about 18mg when I wanted more nic per puff but less less puffs per day, and even that was fine. But when I DIY (and I've tried every nic brand fresh besides Carolina Xtract which is said to be the best and never comes in contact with oxygen during manufacturing, doesn't use as many or any of the chemicals in extraction like other brands but it's like 2-3X the price), even if I DIY other "smooth" nic concentrates VG based at 3mg and flavorless (less burn from flavor base) it's like battery acid compared to ECBlends at 6-12mg with extra flavor (alcohol based none the less which is supposed to be harsh but wasn't really).
-Got my new MODs coming, and that was quite a research project. -Got the new RTA choices listed above I'm gonna pick a few.
-Not trying to go too crazy making a list of modern sub tanks which I want a couple of also still. I need to stay in the loop of e cig gear somewhat so I don't have to search though everything every year or so when I want to upgrade like I did last year and didn't look at anything really since now.
-THEN I hope to get this DIY thing down pat once and for all. I've spend at least a couple thousand on flavor concentrates not to mention cases and cases of VG and many liters of different brand 100mg nic (I was selling too though, not vaping this all) but never found a smooth vape like ECBs %100 VG organic alcohol based line.
The ECB is budget juice at like $8 a 30ml with coupon code which never expires, so I highly doubt they are using something like carolinaXtract nic base which cost 2-3X more.
There's also possibly new(ish) organic USP pharmaceutical-grade choices for VG base and that are not just palm-based anymore. 9Palm is also controversial due to rain forest destruction).
Now they make VG from Mustard seed and corn and coconut and possibly other stuff, and supposedly it's so refined that it wouldn't matter if someone's allergic to coconut/mustard. I have to really look into that though, maybe just see what other venders are not using palm-derived anymore would tell if it's indeed allergen-free to use something like soy or coconut-based. I'm not selling anymore but it's just good to know, and I might end up passing off a few bottles here and there anyway. Another plus is if it's organic grown corn/soy, then that guarantees it's GMO-free corn/soy.
Maybe those VG types give more vapor, but again, I highly doubt ECB was using anything but common palm-derived VG.
I tried many times to find ECBs flavor source of their alcohol based organic flavorings but haven't found them, or they do something to them like heat treat it to smooth them out but I doubt that too. I tried many times in Contact Us to try and indirectly trick them into revealing their flavor source lol but I never got it. Doesn't have to be the same exact flavor though, I just want something very smooth. Still haven't tried VG-based flavors either but VG doesn't carry flavor well at all and supposedly need to add that flavor and a very high %. And FWIW, if I buy ECB now and put it in a TFV8 with a big coil, it'll indeed be smooth and produce a ton of vapor (seems like more than when I vape just 4mg flavorless pure VG) but it tastes off compared to the MTL vape in a protank.
sorry to go on about DIY, that'll actually be another thread, but just saying.