Finished up preliminary center spar installation using clecos for alignment. Removed the center spar, uprights, and T doublers. Drilled holes in the front uprights for the outer spar bolts. Drilled holes about 0.010 undersize for final reaming to size. Assembled center spar and the wing spars. Aligned the bolt holes. Reamed the bolt holes for a light drive fit of the bolts in both spars and each end of the center spar. Cleaned and de-burred the uprights, T doublers, bottom doubler, and fuselage interior where the center spar fits. Prepped for paint. Painted with zinc chromate.
