Initial sketches of the pull out couch designs:
Folding couch/bed: http://www.blazinbelltech.com/furniture.html#Mattress Supports:
Slat system used for boats: http://us.binnacle.com/BBQ-/-Stoves-/-Heaters-Chairs/tables/c7_22/p5739/Neptune%20SLAT%20SYSTEM/product_info.html
Modular bedspring system, Froli: http://www.nickleatlantic.com/gallery1.htm
Got this idea from here: http://www.expeditionportal.com/forum/showthread.php?t=20079
Mattress:
Memory foam 4in topper: http://www.overstock.com/Home-Garden/Serta-Rejuvenator-4-inch-Memory-Foam-Mattress-Topper/3298223/product.html?rcmndsrc=2
Couch/Beds, commercial:
Folding couch/bed: http://www.blazinbelltech.com/furniture.html#
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