On another thread, I explained that one day after bringing it home, the coach batteries were dead. As a result I couldn't level it with the Bigfoot leveling system. Upon inspection, the j-bolts holding the strap that secures the batteries were so crusted with rust, it took me an hour just to get the first wing nut off. After removing the strap and battery caps, half of the cells were dry. I am insisting on new batteries.
Soooo, it's my theory that rather than charge the batteries at the RV shows, that this coach most likely went to, they simply deflated the rear tires in order to level it. Then, totally forgot about it. Who knows at what point that happened. I say this, because the spare is/was at 80 psi.