Separated the R-00917 Shim and R-00918 Attach Strips by removing the hatched areas. Removed the hatched areas from R-00910 Horn Brace. Separated the R-00904-1 Bottom Rib to create R-00904A-1 and R-00904B-1 parts. Removed the sharp edge on the top flange of the R-405PD Rudder Horn to allow it to nest inside the bend radius of the forward flange of the R-00904A-1 Bottom Rib. Radiused the 4 corners of the rudder horn. All parts were already predrilled to final size. Deburred all parts.