If the 47-53 wiper blades are really that loose, then I need to change to the 1954 style. I spent a lot of time and money on making my wiper system electric with delay. For those interested in my set-up:
https://plus.google.com/photos/1055...60484243705462577?authkey=CK6apuON_pONRADenny, thanks for the photos of the 1954 arms and blades.
I am considering drilling out the two rivets on each arm and shorting the arm by a small amount (1954 arms). I'm now searching for the same type of stainless steel rivets that are used in the arms. I would feel better if there were a little more clearance between the blades and the center bar.