I had an assemby that was very nicely fully defined. I added an assembly feature - extruded cut to one sheet panel (part) and SW renumbered the faces of that part so that a very large number of my mates now are either red X'es or say over defined with the yellow triangle. What was the proper way to add that cut without all my mates getting screwed up and now that I have this hosed up assembly.. how is the quickest way to fix it? Why does SW automatically renumber faces when you do something like that? Or have I checked/unchecked an option that I should not have? Again, really frustrating.