Riiveted VS-808PP spar doubler plate and VS-410PP, VS-411PP and V S-412 PP rudder hinge brackets to VS-803PP rear verticle stabilizer spar. Spent about 1 hour taking out five or six rivets after discovering that I failed to counter sink the lower most hole in the spar and doubler plate. My earlier reading of the plans lead me to believe that this was not to be counter sunk. Set all but one rivet using hand squeezer.
