Now we’re cooking with gas!
Ok. So what you’ll want to do is set your white start point to 143 in PPEv2 with this curve loaded into “starting curve.” Make sure there is no measurements (delete whatever measurements are there).
Then copy/paste the “new curve” data back into sublime text and scroll to the top of the K curve. Set the first number to three times whatever it is. This ensure a specular white that can be calibrated.
Then print the 21x16 target for further calibrations.
You have some highlight degradation but I don’t know enough about CT to know how to resolve that bit.
best
-Walker