We were told at the Kz factory in Indiana that they build 5th wheels 12 units at a time from start to finish of each model. If you special order a unit it was mixed into the model line that you choose, thus you had to wait till that model was run ...
One point I might make is that during the winter you have to remember they use rock salt an chemicals on the roads back east an if your trailer is delivered during winter it may have all kinds of cud under it. Thus if your dealer dozen't wash the bottom side of your unit well you may have problems down the road from the salt an chemicals that didn't get washed off ...
Safe Travels