thanks guys, I remember a debate years ago about aluminum vs 316L (same as medical 316 or surgical 316 I think), and the guy who was taking custom orders for his RDA was debating that aluminum he was suggesting was perfectly safe but that he'd make it out of whatever people wanted, and that 316L is basically like if you get bolts in your knee or a plate in your head, 316L is safe enough to be inside your body for life, but he still stuck by his aluminum recommendation.
I am searching now for mods and have a giant list to read up on, I like the ones that give juice flow regulation for bottom coils vs having to add or remove a tiny strand of wicking and get it just right for the viscosity of the juice you are using to avoid burnt or gurgle (Protank). I'm not too set on the 316L anymore, it is probably trivial. I do not like chrome pating that flakes off or anything cheap clones stuff like that though, especially on the inside of a tank. The o rings are another topic but hey, better than the combustion and tar of smoking, if the rubber even leaches into the tank.
I'm not sure even what I prefer to vape in terms of clouds or dual / quad coils. I have a dual coil RDA, I may have drilled out the holes too much, but when I build a dual coil on it at like 2 ohms, I have to vape at such high watts and I get either too hot or not enough vapo. I dunno. I've been using a single coil RDA at like 2ohm and only around 10Watts which is okay but I want smooth clouds. I prefer a low temp vape but I do want to get some cloud stuff. I vape %100vg low mg also.
I'm going to get a handful of tanks, and a new MOD and keep my Hana clone DNA30 I got from fasttech as back up ($25 and it has been working damn well for about 2 years, not a single issue, and the same battery is still going strong. The battery cost more than the mod. I want a dual battery though for the new mod but I don't know how many watts I really need. I'm making a new thread to see about what I should get because I don't want to kill the batteries too fast if I don't even need all that wattage based on how I vape (but might need it for clouds).
Edit, looks like I can just get any $50-$100 150-200 watt mod and use that for something like a sub ohm TFV4 (dual / quad) tank and also rebuild the TFV4 to have a single 1.8ohm coil if the clouds are too much for everyday vaping and just use much lower wattage, no? The battery will last much longer using a single 1.8 ohm coil at 10 watts, vs something like 100 watts, right?