Suggestions to make the convertible sofa bed comfortable?

[3ringcircus]

We chose the convertible queen sofa bed in our CreekSide 23bhs. The sofa slides down flat and the mattress unfolds on top. We love the idea of the dual purpose and the additional space in the camper. After sleeping on it, we chose to add a 3" memory foam topper to alleviate some of the pressure points. This helped, but it is still not adequate for sleeping. In fact there seems to be a slight grade from head to toe. Has anyone else experienced this? What have you done to modify it to add comfort?

[Bucky_Badger]

We took the easy way out and got a futon. Much nicer

[flywithabowtie]

You could get an air mattress