Building The Card Stock Downscale Centuri Hornet Part 5, Cutting Fins

Cut the fins out on the root edge marked side.
The thin black line is your cut line.

You only have to cut the root, outside and trailing edges.
The leading edge is the folded round side.

Here's all four cut out fins.
The fin on the left shows the open three layer laminate.

The cut sides will have a sharp edge on them.
Rub over just the raised edge with the back end of a Sharpie.

While this doesn't give a full rounded outside and trailing edge it does take off some of the squareness.
You can lightly burnish over the root edge but leave it square for a wider gluing area.