Ok, to make things easier, here is a photo with the tops numbered:
To enter the contest you just have to provide one, two or three numbers between 1 and 28.
For example: "4", "2 and 6" or "6, 20 and 22". Only one entry per person (if you change your mind, you can post a new entry that will invalidate the first one. Of course, comments explaining the reasoning behind your voting are encouraged.
If two people have the same number of points, the first one to post wins.
The contest is extended until Wednesday at 5PM (GMT-6).
The problems with the tops just happened because of age and would have happened anyway if they had not been played.
The O-Ring on the Spintastics does not count as it does not appreciable influence how it works.
The old rubber on the Wiz-z-zer tip could have been a valid guess. In fact, I spun it with a string as I was afraid that it could disintegrate. On the other hand, it may still take a few more spins, so we will not consider that a problem.
I suggest you go with just one number or you may finish with negative points
As always, my quizzes are tricky
I may clarify a few more things but I will not announce a winner until the end of the contest.