How have the Levi 505's changed over the years? I wore these for ever from the 70's on. In the late 90's their quality seemed to go down and their sizes were all over the map. I tried on a pair yesterday and was quite surprised at the fit and what seemed to be better quality that the later 90's 505's. Does anyone know what changes in fit and quality the 505's have undergone the last 30 + years? Did Levi up their quality control recently or did I just get lucky and find a pair that impressed me yesterday? How does the denim of today compare to say the mid 70's Levi denim? Thanks for any comments or info.