I love my O.I., it's the ball I shot my 800 with, but you guys that are holding on to them aren't doing yourselves any favors.
I did the same thing with some old A.M.F. Cobra's and some columbia U-Dots, Vector Ones, and Vector Twos, Blue Hammers and Black Turbos.
By the time I actually needed them, technology had rendered them almost useless ( except the blue hammers ), merely light oil balls at best.
Technology marches on, whether we like it or not. Better use them in a couple of years or you too might find you have several glorified "spare" balls, like I did.
P.S. No, I don't have them anymore. I drilled a couple for myself and sold the rest about four years ago.
--------------------
"The difference between stupidity and genius is that genius has its limits."
Albert Einstein