Dad worked on edge finishing misc. parts and peeled vinyl. Drilled the 775 rear top skin to the 707, 708, 709 bulkheads and J stringers. Fit the forward top skin and drilled same to the 707 and 706 bulkheads and stringers. Fabricated the 707 clip and drilled it to the 707 bulkhead and 787 rib. Miss drilled the gusset plates - need to work on a fix tomorrow.