The S1D drawings showed the cove strips in detail. All numbers are approximate from long ago memory. The bottom surface of the aileron bay has a 1 x 1 x approx 70 degree aluminimum angle, .020 or .025 thick. The top surface has a standard V trailing edge strip, 2" wide bent into a symmetrical V. The cove strip is wood and is screwed and glued to the ribs as well as some cove blocks where the cove strip is not supported by a rib. The bottom fabric is wrapped around the lower aluminum and glued to the cove strip. The upper fabric is glued to the bottom of the V trailing edge and overlaps the fabric on the cove strip. A standard ribstitch reinforcing tape is laid over the cove strip and nailed in place, then taped. With symmetrical ailerons this area is much simpler, some used a cove strip and some just left it open.