Think I'm in over my head. Read your Appendix 3 in the SF8 book. The spread sheet part is beyond my ability.
Ran the IT8 again with dE 0.5. After that, and no prescan yet, patch 11 read L 38, A -2, B 0
Did a prescan with gamma 1.0. Patch 11 reads L 12, A -2, B -1
Downloaded LSI reference, same number as on the target. Assuming GS11 is the correct line, it says; L 45.15, A -3.75, B -2.59
thanks for your interest,