Having had 2 knapheide bodies for over 12 years, I'll take Readings hinge over there piano hinge anyday. The newer Knap. body had Stainless Stell Hinges but they still gummed up. My older Knapheide body had steel piano hinges that rusted tight on doors I didn't use alot. I must admit Maine winters can kill a piece of steel [Linked Image]