I think we have quite similar vape styles too vapdivrr, but they are just enough different so we can't agree on tanks like the Aqua V1. I just could not get mine to be a good vape and if I remember right, it has been a while though, I think I opened up the air flow and the juice channels on it. Had the same experience with the low air flow Kayfuns.
OTOH, I really enjoyed the old Lemo V1 once I modified it. If it wasn't for the fill port screw I would probably have got more of them. Gave it to a smoker wanting to try vaping a couple of years ago and he loved it too and is not smoking any more
The Aqua V2 has been very hard to get lately. Ecigitty has an unbranded
Ehpro clone on clearance for $4. I just received 4 of them

. I suspect once these are all sold, that will be it. I vape it at around 18 watts and I think it will handle 25'ish watts but not much more. I think it can also be set up to vape well at 10 watts but I don't go that low so no experience with that. Have not built one yet, but they look exactly like the clone I've been using for a while. If you are interested in trying one, keep a couple of things in mind.
I replaced the large O-ring that does the tank to deck seal with one that has a bit more interference so the tank is sure to seal there and also doesn't turn as easily. It gets a bit tight by the time I want to refill so I always turn the tank 'in' slightly as in reducing air and juice flow, then unscrew it. This works flawlessly for me unless I forget and the whole tank starts to unscrew from the mod.
Have a look and you'll see there is one screw per post on the deck, so you need to install both coils before you screw them down. Also, using 30 gauge wire in Kanthal or SS I find it easy to cut a wire when I tighten them. 28 gauge is fine, but will generally require more power to run. I have sometimes got the 30 gauge installed but it's not dependable so I double and twist the coil tails before installing them. That makes it pretty fool proof and after doing it a couple of times I find it pretty easy to do.
The top part of the tank when removed has small fill holes. I find refilling works well using
long tips on my juice bottles, but you have to take care to have the tip hole lined up well enough with the tank hole or you will have juice leak while filling.
This is not a tank I would recommend for anyone who is not experienced in rebuilding and/or is not willing to put up with a couple of quirks. Having said that, I have taken it to work with no backup confident the chances of it failing on me were really low and it has always delivered. And it comes with a full metal tank along with a plastic section (and a dripper option I have never tried) which should make it pretty tough if you drop it.