Decided to get some deburring finished rather than build the doubler for the VOR antenna atop the HS.  The recessed flanges on the HS-1004 ribs make it a bit more challenging as they flanges are not all on the same plane.  Karrie was working with 320 floss and the ATS sanding detailer kit in 240 grit, while I was using the 6″ grinder with the 3m 7A wheel and the 3m unitized wheel as well as two die grinders with a 2″ 7A wheel and 1″ unitized wheel.  Got a good way into the stack of (8) parts.