Bender
G.O.A.T.
What was the RA to begin with, if you measured it back then? Genuinely asking out of curiosity, because I literally had a conversation about this with a friend of mine today who said that he found out that his RA had dropped since he first got his racquets (he has a RDC machine).I am not sure about that theory : I bought a second hand (if not 3rd, 4th hand...) prestige pro 600 brown 1986 which has been strung with gut at pretty high tension for years, and measured it with rdc machine.
It surprised me a bit, but the RA was 61 ; in 35 years, not even one point dropped.