I do what is necessary to ride safely and comfortably. If I swap out parts, I label and save the originals in case I want to sell the bike in its original state.
__________________
1971 Paramount P-13 Chrome
1973 Paramount P-15 Opaque Blue
1974 Raleigh Professional Blue Mink
1991 Waterford Paramount
Holland Titanium Dura Ace Group
Holland Titanium Ultegra Triple Group