Ive been thinking of cutting a 1/4 inch nice plywood front and back "page" to provide some sturdiness. I'd like to stack three 3" binders flat to avoid the page sag and binder ring torque, but getting them so they are nearly uniform (not a wedge) and sturdy is the key. I wonder for a vertical storage, if you had the plywood pieces, if you could wrap a Velcro strap around it and secure the whole stack of pages in a sandwich of sorts. I cans stand out page sag.
Generally, the condition I look for is: 1800s-1929 - G and up (1+)... 1930-1951 - VGEX and up (2.5+).. 1952-1967 - EX and up (5+)... 1968-1978 - EXMT and up (6.5+)... 1979-1994 - EXMT/NM and up (7.5+)... 1995-present - NM+ and up (8.5+)
