That's strange, did they standardize on the vertical slot opening for the SE after the release of the SE/30?
DC&DftMF3e has the horizontal SE Card diagram also showing the vertical mounting flange of the SE/30. The Radius Magic Bus card and Radius16's PDS were both designed for vertical VidCards mounted to that flange.
DC&DftMF3e has the horizontal SE Card diagram also showing the vertical mounting flange of the SE/30. The Radius Magic Bus card and Radius16's PDS were both designed for vertical VidCards mounted to that flange.