I have not done a lot of Auto-X in many years but back in the mid '90's I did a full on campaign for three years running a MK1 MR2 in CS, actually ended up 3rd regionally in my last season. I learned early on to document everything because there are so many variables. I kept a log book that noted alignment settings, the MR2 was very adjustable but I really found that toe, both front and rear, really affected how the car felt on course, Temps,weather, venue, and tire pressure. Because I stuck to the same tire season after season, there were not many choices back then, I was able to hit the track with a good set up and concentrate on learning the course instead of fiddling with TP and alignment settings. I also found it interesting when talking to other MR2 drivers how different we liked our cars set up but would all be pretty darn close in our times. It just goes to show that what works for one person may not work for another. With all that said it sounds like the OP has a good base line so just document all the changes you make and you will soon be able to show up at an event and know what you should be running for TP right off the bat.