Add the two small sub-ribs for R1 and R1a and then sheet with 3/32" balsa. Note that the sheeting stops at the trailing edge of R1 and R1a and goes to the center of the rear spar.

Install sub-rib R7c and then add W13 to the trailing edge. It is imperative that the WS5 and WS6 portions of the wing saddle be in place when laminating W13 to W12 in order to keep the trailing edge perfectly straight. Sight down the trailing edge and make any adjustments before gluing.

NOTE: Leave W13 unshaped for now as it is easier to finish after the flaps have been constructed.

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