Just finished installing a new water tank on my Excella. I was fortunate to get a new tank from Andy out at Inland RV
(great people to deal with and appreciate the follow up call from Cathy). The tank was the exact tank and the only problem that I had was when I hammered the protective sheet metal that the tank sits in back out, the holes didn't line up perfectly on the street side. An hour with a drill and some self tapping screws and a few broken bits trying to drill the pilot holes and tank was complete. I would estimate from the start of the installation until completion was about 4 1/2 hours.
Guess the next item is replacing the 30 year old shocks. Got a good look at them while underneath replacing the shock and figure I'll shoot another day practicing my profanity.