I retired from the Navy and then started driving OTR. Then after I stopped driving we bought a 2005 35 ft with 3 slides with the 310 hp v10. It was 4 years old. Then in 2012 we found a 42 ft dp that had 4 slides and many extras that we had on our list that our next rv must have. It had the Cummins ISL 400 with a Jake brake. I found it on consignment in Ft Myers, Fl. We have never looked back since we bought it. I made a statement to my wife that maybe I would sale it next year. The look she gave me and her words of wisdom that only a wife can give you changed my mind.