Grand Design sofa bed in our 337rls

Our son and his wife slept on the couch pull out and they said they felt like they were sleeping downhill and was uncomfortable and the bar kept hurting their back. So we tried to put more covers to even everything out and helped a little. So went into owner forum and I asked other owners if they had this problem and yep! Problem we found out is the legs are too long for the bed. Grand Design is aware of the problem and suppose to be correcting it. So hubby going to cut down the legs. I guess just little problems are expected to happen. But with the few things wrong with the unit there are a whole lot more right! We do love this 5th wheel!!! Just thought I would let other Grand Design owners know in case they haven't used there pull out yet. Tara