Not only is it an excellent installation, but your documentation is excellent, as well. Good job!
The spin-weld fittings are something that people need to be aware of if they buy polyethelene tanks. I was not aware of them, and the company I ordered from didn't mention that installing them took special equipment. I told the company just to send me the tank and I'd locate the fittings. I ended up not being able to install them, so I just cut holes in the tank (potable water tank) and ran pipes in from the top. It works okay, as the holes are fairly tight around the pipes, but I worry about sloshing causing leakage while in transit.
92 gallons is a good tank size, I think. I have a 40 gallon tank, and it lasts me about a 6 or 7 days.