Filed reliefs on the correct sides of replacement shoulder harness anchors; deburred and smoothed. Clecoed them in place on aft skin and final-drilled #30 rivet holes. Final-drilled all #40 rivet holes in aft skin, bulkheads and longerons. Removed skin and match-drilled #30 holes through bulkhead gussets and longerons. Removed bulkheads and gussets and removed canopy rail receptacle and harness fairleads from forward bulkhead.