Semroc Saturn 1B, Build, OOP #KS-1, Part 25, Built-Up Fins

The center crease is done gradually.
I can pinch the fold over the top of the architect ruler.







The final sharp fold is burnished with the back end of a Sharpie barrel.
Be careful not to burnish over the trailing edge crease, it is subtle but should still be easily seen.







Here's all the fin skins with the two extras.

Notice the trailing edge line on the lower left.

Build time this post: 0 hour, 20 minutes
Total build time so far: 26 hours, 25 minutes