I have a 210 with the front bunk. I put aluminum angle on the bottom ( non folding) part and the same on both top and bottom of the folding part. They set on the angle iron (aluminum) that is mounted to the side walls when lowered. I have a teenager that sleeps up there and I didn't like the thought of him being over my head. The metal took all the bow out of the decks. I also put 4 larger hinges to distribute the weight.
2011 Fun Finder 210
2001 Chevy Express