Some interesting theories here guys, but my birds go through bob wires into a box with one pad. The second set of wires are across 14" so they must pass over it to get to their section. The pad should be reading to 100th of a second. eg the last race when 4 dropped in, they timed at 36 secs and 3 on 39 secs. The clock is supposed to take 500 rings but I clear mine at the start of the season. this season started with 36 O/B`s then added 36 Y/b`s. As has already been said "bin the ring" thanks. Allan