Asssembled the horizontal Stab Front and Rear Spars. Drilled up the holes to #30 and manufactured the two angle brackets. I didnt care for the result of the two angles and decided to remake them. Fluted and Deburred the 904 and 905 Ribs for the HS. I modified a motor assembly to allow the attachment of scotch brite to the spindle. This worked great for deburring the lightning holes in the ribs.