Interesting. Could not resist making this table. In ideal conditions (everything flat, balls perfectly round etc):
- An error of a 1/2 degree (worst pro putt) will make a putt of 7 meters / 22,97 feet roll outside the edge of the hole.
- Double that error and you'll (obviously!) miss the putts on half that distance..
EDIT:
Forgot to say this, but a discussion about how plane and face alignments contribute to direction is relevant, but ignored. There are no flat greens and no round balls anyway... 