We changed the horrible "Cloud Ten" king mattress in our Pinnacle for a 18 inch queen size Simmonds EuroTop, the day after we took delivery of the unit. Our Pinnacle was a factory order, but Jayco wouldn't leave out the mattress, or change it for a queen. There is much more room in the bedroom to move around than with the king. The "Cloud ten" was donated to a charity...it was never slept on.
The old one came out, and the new one went in, quite easily.
We are full timers, and it was worth every dollar for a good mattress. DW was a little skeptical when I took a Skilsaw to the bed platform in a one day old unit, but it was a simple modification.
David and Denise
2011 Jayco Pinnacle 36RETS, GMC 3500HD D/A dually
Full time since May 2011