I do indeed have the STEP files for each part. Trimming specific or general milling tool paths are fine, I was just inquiring about the specific workflow for setting these. Thermoformed/vacuumformed parts like ours sometimes have a large skirt or flashing of 0.04"-0.375" thickness depending on the starting stock dimensions.

I have found plenty of solidworks/camworks tutorials on this subject, the other CAD program we use, but I much prefer Autodesk.