Estes Payloader II #3022 Build, Part 5, Fins, Leading Edge Rounding

The laser cutting didn't quite go through the back of the wood!
Not a big deal, a sharp blade and straightedge freed up the fins.

The instructions say to round the leading edges of the fins, the outside and trailing edges remain square. How do you get rounded leading edges of the "dorsal" fin (Part H) and main fin at the corner joint?

You could sand them both round after the two pieces are glued together but I prefer to round the smaller, dorsal fin first. It's hard to get into that corner. Sand it round now and it's less work later.

Don't pre-round the larger main fin. When both are glued together you'll use the dorsal fin as a inside corner sanding guide.

On the left is the first dry fit of the two piece fin against a straightedge. The gluing edge doesn't match up.

After some truing up with a sanding block you can see the better fit in the inset picture.

Pins are set into the cardboard underneath to press the two pieces together. Don't press the metal pins too tight against the fins, the pins might dent the wood edges.