Thank you for your comments! I am happy to be the experiment here. I agree that 1 year is hardly a test. I think the failure mode would be delamination, and only leakage and smell in the event of massive delamination or other metal deterioration (which would not be caused by my modification). I don't believe that a pinhole corrosion with no delamination would cause significant smell. That will be assessed down the road. Keep in mind that this ended up being preventative - the smell nastiness likely came from the fuel vent being misdirected as per the video, and maybe other old grime and leaks.
I did look briefly into getting a custom tank - I forget the price, but i think it was >$2k, so I passed on it. I don't consider myself a "youtuber" or whatever, I just enjoy making the videos, so it's been done in earnest. I have infinite things to do other than make videos that I don't believe have value to me or others.
I bought and read your book,
Peggie, and yes as per the above video replaced *every* hose (well except the air vent which will be done soonish but has been thoroughly cleaned and tested). It was after that still seeing some off-colored water that I decided to pull the tank.
Because of how small the tank is, if I ever have to repair it - then I would look into an integral fiberglass tank to increase capacity. This tank is relatively tiny. Same comment for my aluminum diesel tank which
I did the same horrific modification to - however that tank did indeed have pitting in it.
And...I will keep to my word that even if it's a few years down the road I will indeed make an update video if disaster happens.