excuse my English skills, please. I am a student from Germany and i want to write a macro which cuts defined rectangle "windows" in a pipe like the first picture with the corsur. My problem is i can not select only the inner edges with the macro to make a fillet with FeatureFillet3 like the second picture. SelectByID2 is not the right tool for it, i think. Mayby there are other ways to select the edges automatically? I tried a lot but always i got all twelve edges or all faces but not only the inner four.