Hi Sean, Jose

My guess is the only simple, cheap solution to this problem is the humble
numeric keypad that the bingo ball operator uses to key in the number. May
sound clumsy and low-tech, but keying in 2 digits is probably much quicker
than orienting the ball through a code reader and trying to get it to read
a curved surface - look at the number of mis-reads that supermarket check-out
people get when trying to read in less than flat bar codes.

Geoff.