Here's one that has perplexed me...
When a score bar has, for example 7 red beads and 3 blue beads - assuming a game goes to 7, what do you do with the blue beads. If they are there to count games won, what way do you push them? Same with the combination of colours that you mentioned bb - how are they utilized? Confused in Canada
I believe those games went to 7, and you had three beads to count games in a set best of 5. And the first Deustch-Meisters and greentop TS's (1978: Warren & Columbus, OH, Flint, MI, Philadelphia, PA, Ames, IA, and Chicago, IL) I saw had the pips going to 11, one for each ball, and foos games in my area at the time went to 6.
The most unique was in Iowa, where I was an Engineering Student, and they played "Corners", serving on either ramp in the goalkeeper area.