Charles...do I remember seeing some Murphy bed hardware in the L.V. catalogue? Seems to me it was one arm, three legs and mortgage on your firstborn.I worked at a place for a while that built them and they only used the springs but they were very light weight construction. John is correct when he says that size and weight is what determines what you need. Most plans probably specify which system you need and possibly a specific model.
Visit this place:Hi Guys. I am wanting to build a Murphy bed, twin or single size. Can anyone tell me if, because of the small size, I need the gas struts or spring system to help lift it?
That's about the same as LV's hardware price.why not get a bare Murphy bed and cabinet it the way you see fit...
Murphy Bed - Stone Barn Furniture