To me it is one of the more important things if you are running the car in different conditions. If you are making adjustments and not doing this off of a baseline that is accurate, how do you keep proper notes? I guess its the old stock car racer in me.

1968 Pro-Touring Dodge Charger
*2011 Optima Ultimate Street Car Challenge Invitee
http://www.popularhotrodding.com/features/1203phr_1968_dodge_charger/index.html