My track uses playing cards. 4 staging lanes each lane is assigned a suit spade,club,heart,diamond. First card pulled races second card pulled. We had used the same system for first round byes so if you went to the empty lane usually lane 1 by us, you had a 25% chance of a bye. Now we run the bye off the best reaction time in the second round of qualifying. Not sure if your chips are marked with lanes. I am sure this was of no help but i am curious how other tracks do it...