Sand and buff the two HS-903 Rear Spars and the HS-906 Rear Spar Doubler Plate. Very tedious long process, but I want to do it right. Cleco the two HS-903 Rear Spars together with the HS-906 Rear Spar Doubler Plate and match drill, enlarging the pre-punched 1/8" holes to #30. Fabricate the two HS-909 shims. Cut one of them too short, has to make another from scrap metal. They look great.