Use a smaller tool to remove material left from a large tool of a TrueMill operation.
Create a TrueMill operation.
Click NC > 2 Axis > TrueMill Reference.
Select the TrueMill operation from the list, and click OK. The operation dialog appears which contains the same settings as the TrueMill operation.
Click the Select Tool button to choose a smaller tool.
Set the other dialog values and click OK.