Creating a thickness for a complex contour.

Hello, we are inspecting some Aerospace test fixtures for a 5-axis machine.

One of the fixtures is a so-called “S-test” that is essentially an S like contour that needs to have a constant thickness +-.1MM.

For the outer counter points a loaded it into CAD and created some points along a spline that was created by intersecting a 0,0,1 plane at the depths I wanted to create the inspection points.

For the inner contour I have found two ways to generate the points and both are tedious.

In PC-DMIS I can copy the outer points and increase the prehit while flipping the surface vector. This will give me points with the wrong nominals but it works when dimensioning the points. This requires me to manually flip all the IJKs (is there an easy to mass flip IJKs?)

In my cad software (Keycreator 7.0.2) I can create vectors normal to the surface at those points but I can’t find a way to select all the points without doing it manually.

We do have a scanning probe on the Bridge CMM we are using but we are not doing it as a scan.

Any suggestions of a better approach or a fast way to get the required vectors?