4/4/21 – 3.4 hours Assembly of the aft fuselage starts with the preparation of sub-structure parts. The plans call out several parts that need to be separated from each other as well as some minor modifications to a few of the parts. My routine for this type of task is to also completely debur the edges and holes of each part so I don't have to remember to do that later. The first set of parts to separate are plastic cable guides. The cable guides are small – just an inch long when separated. The kit includes two strips of four guides each in the miscellaneous parts bag. The easiest and cleanest way for me to separate the cable guides was with a razor blade. The next step was to separate the Stiffener Angles. This required the removal of a small set of connecting aluminum between the parts, which I did with the Dremel and Metal Cutting wheel. I finished the separated edges with the bench grinder and 6” cut-and-polish wheel. Separating the J-Stiffeners was similar to the Stiffener Angles, and I used the same procedure to separate and finish the edges of those parts. The final steps in this section were to separate the Battery Angles, final drilling a 1/4" hole in each of the F-1037A Battery Angles, and removing a small section from the F-1037B Battery Angle. Removing the section from the F-1037B Battery Angle was an interesting process. It started by drilling a #30 hole through the middle of the bend radius. I measured the location of the hole, and used a drill v-guide to drill a straight hole. I then used the Dremel and metal cutting wheel to trim away the material up to the hole I had drilled. The end result was a very clean notch out of the Battery Angle with a nicely radiused inside corner. [Dremel, Metal-Cutting Wheel, Bench Grinder, 6” Cut-and-Polish Wheel, Ruler, Sharpie, #30 Drill, 1/4" Drill, Drill Guide, Edge and Hole Deburring Tools]