Unless you really know the gunsmith is good I’d let well enough alone and just clean and oil it .. free owners manual with takedown/disassembly http://www.remington.com/Pages/News-and-Resources/Downloads/Owners-Manuals.aspx
LOL .. “Niedermeyer” ... got the silver helmet?
I had found that site but it doesn’t list the model 11 from the 1940s and earlier. I have to request the ‘obsolete manual’ . Thanks anyways!