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True position applied to a thickness

I have cylindrical shaped part with three fins around the diameter, equally spaced. See FCF:  I am taking a point on each side of each fin to determine the .079-.118 thickness, then creating a midpoint between the two points. Then I used the midpoint to do the true position, but since it is a point, I can't take advantage of the MMC. I can probably have PC-DMIS put on the thickness on the report and then calculate bonus manually and subtract that from the true position on the report. But is there a way to have PC-DMIS do this so that it can take the thickness and then calculate bonus and apply it to true position?​