Our 2010 2350 had a sofa/bed made by Paul's seating. http://www.paulsseating.com/
To store the bed we just pushed the control box down in between the bed and the wall in the little square hole. It did not fit very good but we did the best we could. Then we folded the sides of the the air mattress in about six inches so they would not pinch in the sofa fame. Then we just closed the sofa. The air mattress that came with the sofa was a piece of junk and only lasted about a year with only using it a couple of times to try it out. We went to Bed, Bath and Beyond and bought a better mattress but it still was not very good for sleeping on.
If you need parts for the sofa or mattress, call Carol at the factory and she will get it for you a lot cheaper than if you can Paul's seating direct.
If you plan on using it a lot, you might want to think about changing out the sofa for one of the newer sofas, but you will lose the drawer under the sofa.