Hello to everyone. Hoping some one will be able to help us. We recently bought a 337 (like only 4 weeks ago) and the mattress in it has already started to sag big time, we are not big people so it is not because of that. I cut the tag off it because I didnt think we would be having this kind of a problem with a new mattress. Called GD and sent pictures of the mattress but they now want us to take it back to the dealer so they can take more pictures, what a pain, they only need to look at when we bought and took ownership of it to know we have the mattress they put in it, any way we are looking at having to get another mattress as this one is imposible to sleep on so need some help on what to get? We measured it and it is 60 x 80 so a normal queen but seen some one say it is a short queen.