1/10/2021 – 3.4 hours This work session focused on deburring the skeleton parts for the horizontal stabilizer. There are 20 new parts, including nose ribs and in-spar ribs, with a lot of edges, flanges, and lightening holes to deburr. I used the deburring blade tool and Scotch Brite flap wheel to debur the lightening holes in each piece. I completed deburring the edges of one set of in-spar ribs. I also laid out the horizontal stabilizer build cradles using a nose rib and inspar rib as a template. [Deburring blade, Scotch Brite Flap Wheel, 6” 3M Cut-n-Polish Wheel, Maroon Scotch Brite Hand Pad, File] 1/12/2021 – 2.8 hours After taking an evening off for the college football championship, I returned to deburring the HS skeleton parts. I purchased a set of needle files at a local hardware store to help with deburring the flange gaps and bends. The needle files were perfectly sized to get into those tight areas, and I was very happy with them for light deburring tasks. The flat needle file was also really good at removing the CNC tooling marks on the flange edges. Deburring with the needle files added to my process still takes a lot of time and effort, but it is much easier and more effective than without. It definitely does not replace deburring blades and Scotch Brite pads, but is a very nice addition to the deburring tool box. [Deburring blades, 6” 3M Cut-n-Polish Wheel, Maroon Scotch Brite Hand Pad, Flat and Round Needle Files] 1/13/2021 – 4.0 hours The initial deburring of all the HS skeleton parts is complete. I will take a short deburring break before inspecting each part to ensure I haven't missed anything. The next step in the part preparation process is to ensure the flanges are square and flute as needed to align the predrilled holes in the parts. The plans also call for changing the angle of end flanges on two nose ribs and two in-spar ribs. These will be the center ribs of the HS structure which is angled to allow mating with the empennage. [Deburring blades, 6” and 1” 3M Cut-n-Polish Wheels, Maroon Scotch Brite Hand Pad, Flat and Round Needle Files, Hand Seamer, Fluting Pliers, Carpenter Square, Protractor] 1/14/2021 – 1.2 hours The work session today was pretty short to inspect all of the HS skeleton parts and ensure they are deburred properly, the flanges are square and adjusted per the plans, and the flanges are fluted to align all the pre-drilled holes. I have about 4 days left until the next nice day for priming outside, so I'm trying to get the skeleton and skin pieces drilled, deburred, and dimpled by then. The edges and flanges of the skeleton pieces only need some minor deburring touch-up, and they will be ready for priming after the holes are drilled, deburred, and dimpled. I finished this session by re-drawing the outlines of the nose rib / inspar rib template on the piece of 2' x 4' x 5/8” particle board for the HS cradles. [Scotch Brite Flap Wheel, Round Needle File, Maroon Scotch Brite Hand Pad] 1/15/2021 – 0.8 hours The final task of this section is to make construction cradles for the horizontal stabilizer. I used a hand jigsaw to cut out the templates that I had drawn previously, and attached 1” x 2” cleats to the bottoms of the cradles to let them stand free and to provide and area to clamp them to the table. I lined the cut area with simple straps made from duct tape to help secure the skins in the cradle and protect them from damage while I'm working on them. With any luck, I'll also be able to use the cradles to store the HS when it is finished. [Jigsaw, Circular Saw, Drill, Screwdriver]