Cliff, they were gone before Larry got to OCIR as a starter but those are very early reaction timers. If the very bottom light came on it was a 001 light and up the pole top the top which was a 10 light. If the top light was on and the light 3rd from the bottom was on that was a .013 light, top 2 was a 019 which was the worst you could have on that system. Wasnt the most accurate system and got tossed after many complaints of how could I run right on with a 10 light and lose to a guy who was one over and a 11 light.. Plus the timing system was battery operated and if one of the batteries was low on power it would affect the whole system.. Hope this helps