To the OP,because I find it hard to correctly attribute those quote things without my making myself look a complete numptette.
I have seen the blinking ball,most commonly whilst putting,and specifically when other people are putting.I have not as yet been observant enough to note whether it can form some sort of indicator,but you can wager a tidy sum that I shall from now on.
I also am still trying to get the putting "down".Maybe now,I will not have to work so hard at it.Gosh,imagine that!
Thankyou for highlighting something that may well be of use,and for prodding my conciousness in timely manner.
Lizzie xx