I glued the boat tail into the body tube. I don’t know why. It would have made more sense to wait until after filling and sanding.
I used a hand pick to collapse and clean the body tube spirals, primary and secondary.
Then I applied thinned CWF to the boat tail and the spirals.
After sanding, it looks like the spirals will need more work, but I’m going to do that later.
I shaped the fins, following the Estes recommendation of using an emery board. I held the fin against a piece of wood while working on it.
The darkened edges left by laser cutting helped in seeing what I was doing. What I aimed to do was to reduce the thick darkened edge to a thin darkened edge, without getting rid of the darkened surface entirely; I wanted maybe 1/32″ thickness left. I didn’t worry much about getting a perfect airfoil shape, as long as there was a gradual taper to a thin edge. I left the root edge alone, of course.
Here are the fins with the servo pods glued on.
Semroc provides an improved way to mark the boat tail for the fins. Instead of having to sight along two marking rings, you put the straight edges on a flat surface. Then mark.
First two fins being glued. After the first fin went on I taped a piece of paper with a straight edge around the tube to serve as a fin endpoint marker.
Four fins and a nose cone. The fins ends aren’t as even as I’d hoped, but at least it doesn’t fall over immediately.