Estes Solar Sailer II, Kit # 2044, Step 6, Dowel Trim & Truss Sizing

I used a single edge razor blade to cut the dowel overhang. 

Note it was cut a bit long so I could sand even with the root edge of the small forward fin.

Here's one of the three finished fins, ready to be glued onto the lower BT-50 tube.

While the online truss detail fins were the correct length, I cut mine out a little high.

The pencil lines show where the cut should be, down the middle of the printed border lines.  

Here's how my truss fins fit initially - too high when set into the BT-50 tube "step".

The inset picture shows how much was sanded off the bottom root edge to lower the height.

The top piece is the sanded, lower height fin. The fin underneath shows the height before sanding.