A pair of very nice rock-and-roll bed hinges have just arrived from NLAVW: http://nlavw.com/gb/interior/168-a-pair-of-rock-and-roll-hinges-for-t2-bay.html [Note: the price has gone up dramatically since I ordered mine yesterday!] They appear to be well-made from strong steel. They also have longer straps at the back/top, with a handy kink for the rear edge of the seat back panel to sit in when in bed mode. The springy click thing that forces the back to lift when you push the base down, when converting from bed to seat, seems to work nicely. Will report back once we've actually built a rock-and-roll bed with them. It'll be a full-width one using 18mm marine ply.