Zitt,
TZ doesn't really "sort" the balls.
It attempts to keep track of where the Powerball is using eddy sensors, and tracking logic.
Goldball somehow identifies the "gold" ball, but I never looked at the mech that does that.
--
Chris Hibler - CARGPB #31
http://www.Team-EM.com
http://webages.charter.net/chibler/Pinball/index.htm
http://www.PinWiki.com - The Place to go for Pinball Repair Info