F704 Final Finishing. Drilled F704 Center Section spar web for 3/4" holes and larger bushings as allowed for more electrics under DWG 22. SB750-10 bushings installed. Drilled and reamed 1/4" holes for F904-J center section spacers. Primed F904-J spacers and buller spacers and test fit all to ensure alignment - used close tolerance bolts.
