I still stand that the tank has cost $0.85/gallon and there's not a thing that you can say that will refute that for me and most of the people who have followed this build.
Certainly, you can define whatever price you want and it is completely relevant to you. However, I don't think you can speak for most of the people following this thread. They are all pulling for you (as am I). However, I doubt that is the price tag they would put on the project.
Indeed, if you asked, you would find numbers all over the place. Many might even make it negative (e.g. -$1.50/gallon) as they consider the thread valuable to posterity.
I've enjoyed this thread. However, to me, I don't see a savings. First, because I would value my time very highly (as does my employer). Second, I'm not sure, until you are successful, that we have learned anything yet. We don't know what has worked and what hasn't. We have no idea what the cause of your problem is. If you end up with a non-leaking tank, we can take something away from that. However, to this point, there is nothing in this thread that we can point to as a guide for how to make a tank because you haven't made a tank yet.
I don't want that to sound overly harsh. I've really enjoyed this thread, and I have confidence that, at the end of the day, it will hold water. However, to this point, we can't realy glean too much that we can take away and start building our own tanks with.
p.s. I hope we don't have to be 100% "Rah! Rah!" to participate in this thread. I'm definitely on your side, but I'm not a sycophant. However, if that is what the moderates expect, than I can pretend to be one in order to see the conclusion of this thread and not get kicked off the forum.
p.p.s I joined this forum *only* because I wanted to follow your thread, so I am very invested in seeing you come to a successful conclusion!