Brief Description: Enlarged holes to run AS brake lines
I used a Dewalt angle drill attachment and a 1/2" unibit to enlarge the holes that the brake lines will go through. On the two forward bulkheads, enlarge to the bottom hole of the two 3/8" holes using the 1/2" unibit to drill the first hole in the F-1404 aft center section bulkhead then attach a hex extension to the same unibit so as to run it through to the F-1403 forward center section bulkhead. Use the same tool for the seat ribs. I had to use the larger unibit for the outermost seat ribs because the 1/2" bit was too long and would contact the elbow fitting that's attached to the gear brace. Using the larger unitbit means the 1/2" size only protrudes through the hole part way, maybe an inch.
