Not a whole lot of time spent on the fuselage today. Lots of other projects were going on, so I did what I could. The first picture is the method I used to make sure the tubing centerlines are accurately drawn on the adjacent tubing. I put a small machinist square on the line and lined up the straight edge on both sides. I then took a welding pencil and marked the tubing intersections on top of the longerons so you could see what was hidden underneath. This worked really well. I just had to be careful and draw a line that was correctly aligned on a curved surface. I was able to get a couple of tubes in as well.
