We were told that we would not see ours built. We could see what was online that particular day (that we were there) as we arrived after our tt went offline. When we were there, the 5th wheel Designer was being built (on tour). We purchased a tt and had hoped that was the tour we would see, but no such luck.
Call Jayco and ask for 'John' (who does the tours). Perhaps he could give you a heads up on when to come and see the 5th wheel's being built.