Basically, I am trying to cut out a vent for a fan. The vent feature of SW requires the vent to be on a single face, and in this case it is not. The bottom half of the case has a mounting flange (highlighted green in attached image), so I cannot place the vent where I need to. The model was imported from a .igs file and I cannot simply "delete" the feature. How can I remove the highlighted portion and extend the face across the deleted portion to create a contiguous face to cut the vent?