Lynnmor, didn't KZ get away from the water console that was causing your problem? I know my 09 still had the gravity fill/city hook up and I thought they went back to that in '13.
I understood where your knot hole was, I have a big one in the dinette support, just making a point about lumber in general.
As for my KZ dealer, I needed a slide roller on my rear slide Jag (previous KZ trailer) and the item and trailer was discontinued so the dealer drove to the KZ plant to speak personally to the KZ parts guy and to get what was needed. The repair with part was $150.00 even with the 140 mile one way trip to the plant.
I once had a Starcraft (Jayco sister company) that all four tires rubbed the wheel wells because of improperly welded metal wheel wells. The dealer worked with Starcraft and had both axles replaced which had to be custom made at a length that wouldn't rub. Again a testament as to what a good dealer can accomplish.
Sometimes I believe the dealer is more important than the trailer brand.