Extrude Direction controlled by Expression?

[tqqlin]

After an extrude is created, is it possible to have an expression control which direction the extrude goes. The reason I ask, I have a start model created that has multiple features, that has multiple extrudes all going in the same direction, if I want to reverse the directions I have to modify each extrude individually. I was able to create a macro to do this. But would rather control with an expression.
Rob
NX7.5.5.4

 

[cowski]

Create a vector expression, then in the extrude dialog box press the button that brings up the vector picker. In the type dropdown, choose expression and pick your vector expression from the list.

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