I have the opportunity to buy a 2006 Cambridge Fifth Wheel by Keystone. However in doing research on the model I've found it was only manufactured for the model year 2006. My understanding was that it was intended to replace the Big Sky model at the top of the line. Yet today, Big Sky is still available and Cambridge seems to have been a one year product. Does anyone have any idea why it failed or just what happened? Reviews I've seen are all very good, does anyone have anything they could add on the quality of the Cambridge. Is there a Cambridge Owners Group? Thanks for any additional information that can be provided.