Initial Prep (Debur, Trim, Drill, and Cut) 1/26/22 – 1.4h 1/28/22 – 1.3h 1/29/22 – 2.7h 2/14/22 – 1.1h 2/15/22 – 2.9h 3/4/22 – 2.1h 3/15/22 – 0.2h Each rear spar has three flat plate doublers where the aileron hinges and outboard flap hinge attach. Preparing the doublers includes match drilling them to the rear spar and cutting the aileron pushrod hole in the W-1007D outboard doubler. I started cutting the pushrod hole by using an old geometry class template to find a circle with the correct diameter to match the rounded corners of the hole. I planned to use the step drill to remove the material up to that diameter. This approach cleanly removed a lot of the material, but there was still some that had to be removed another way. I used a combination of Dremel grinding wheels, files, and deburing tools to get to the final shape and size of the hole. The final task for this step is to final drill the rear-spar attach hole in the Rear Spar Doubler Plate. This is a critical hole (it is where the wing aft spar attaches to the fuselage) and should be drilled with a drill press. After the hole is drilled to 11/32”, it is attached to the Rear Spar Reinforcement Fork and the holes in both parts get reamed to 3/8”. I decided to final drill the Rear Spar Doubler clecoed and aligned with the Rear Spar Reinforcement Fork to ensure the holes aligned correctly. The manufactured hole in the fork is just slightly larger than 11/32”, and worked really well to help center the bit for the hole in the doubler plate. I then left the parts clecod together and clamped in the drill press, swapped over to the reamer, and reamed both holes together. The result was excellent, and I feel really good that the holes are aligned, straight, and sized very precisely. There shouldn't be any problems when I eventually attache the wings to the fuselage! [Cleco Clamps, #30 Drill, #40 Drill, 11/32” Drill, 3/8” Reamer, Flat and Round Files, Hobby Files, Dremel with Metal Cutting Disk and Grinding Stones, Step Drill, Hole and Edge Deburring Tools] Prime 2/10/22 – 0.5 hours 2/16/22 – 0.5 hours [Grey Scotchbrite Pads, Bon-Ami Cleanser, Dupli-Color Degreaser, Dupli-Color Self-Etching Automotive Primer (Green – Rattle Can)]