interesting comments on
Maptalk NZ about newest SI sticks (SI11) - the new sticks have a flashing LED to show that a punch has been recorded, but it is while flashing another punch cannot be recorded. The default time is 5 seconds, which would really screw up a micro finish chute like Day 1 sprint where many runners took less than this ( & some-one managed a 1 second leg!)
something to keep in mind when the new sticks start appearing around the traps