There is a shot that I have been having more and more trouble with lately. When I think I can shoot the CB between 2 OB's and it looks tight, but to me it looks like it will go through, but a lot of times it don't. Yesterday each time a shot like that came up I would stop and get another ball to measure if it went through. About 50% of the time what I thought would go through didn't. Seems like I have more trouble when one ball is a little ahead of the other. Is this just an illusion that most players have or is it that I probably need glasses at 72? Is there some other way of judging it? I have had this problem for as long as I can remember and chalked it up to too much to drink, but don't drink now. Johnnyt