So last year we had 4 sets of pax factors, the official chicago scca page, the reno scca page, what was in the computer for the start of the season (which matches the printed card), and what was in the computer for the end of the season.
What a clusterfuck.
This year I am only using the name, class car number and raw times from the PC. I will do all the other processing from the safety of my house!