Anything specific your looking for an answer for? I’ve changed some things on mine here and there. Mostly it’s the dealing with the dealership that makes the warranty work or not when problems pop up.
My first toy hauler. Came out of a four seasons camper to this. Some things are lower quality. Some I would like them to change at the factory. And a couple I have talked to the designer about and he has changed on new units. KZ has sent me a couple warranty replacement items instead of me going to dealer to install something I know more about than they do. Or things so simple a trip to the dealership would be a costly waste when weighed against the item.