Murphy Bed Hardware?

Q:I am planning to build a murphy bed and has some questions: what is the cheap, easiest, hardware to use for example?
A: I needed a Murphy bed but the only hardware I could find was for a bed that would protrude 22 inches from the wall in the closed position. Much too big for the room. So I had a foam mattress made 6" X 60" x 80". I made a 2" thick torsion box, 61 x 81 and hung it at the lower end of the cabinet with a continuous hinge, steel brass plated 11" from the floor. So the top of the bed is 11 +2+ 6"= 19 " above the floor. Then I built shelves on each side of the cabinet for books and other decorative things. My wife displays weavings on the face of the torsion box so the wall doesn't look like a Murphy bed.
I also have made 2 pieces of 3/4 " x 11" plywood that store behind the bed in the cabinet and fit together like an egg crate these I put under the bed 3/4 of the way toward the foot of the bed to hold it up level with the hinge. One is 4ft long and the other is 2ft long.
The bed has been in place since 1998 and works just fine. I spent 6 weeks in there recovering from knee surgery. The thing is very comfortable. And looks a lot better than those 24" deep Murphy beds.