Yea I feel the same way. I just won’t be going to KC. Lawrence is the next closest dealer. To many inconsistencies In there stories.
I would be curious the book time on pulling the tanks on these tractors. They do kind of look like a mother to pull. As long as they actually did though and didn't just clean them where they sit.
As far as the sending unit (unless we're talking about the pickup and not the fuel level sending unit), that was most likely just swapped out and not tested, but who knows. You could ask for the old part back, throw your multimeter on there, check the resistance, and see if she is in fact still good.
Which if your gauge was still reading properly, it most likely would be.
I can't remember what mine tested at a while back when i thought i was having a level issue. Something like 4ohms full and just over 100ish empty.
Hopefully she was nasty/rusty or something was obviously damaged, and they didn't just play swaptronics with your wallet. In the automotive world the inexperience will get you long before a crooked tech will.
Edit... Had to go look at my post from beginning of the year.