Today I countersunk the rear spar set-up from last night. Once that was complete, I disassembled the rear spar assembly, drilled #12 holes in the 6 rudder hinge brackets, deburred the rudder stops, and Clekoed the rudder stops to the top lower rudder hinge bracket in preparation for match-drilling. The rest of the time was spent deburring the individual parts of the rear spar assembly in preparation for priming.