I just bought a 2000 Mallard 24j. The jacknife sofa is not very stable when folded into the bed and I shift around. The outside slopes a little and almost makes you feel like you might roll of. I hace searched several RV parts sites, but can't seem to find a support leg. I would like to have one I can fold down from the middle sofa support, but I guess a piece of wood is the easiest and cheapest. Any advice or ideas? Thanks.