Carded MMX Estes Sky Writer Post 2

The fins were drawn slightly oversize.

Go ahead and pre-crease the fold line while it's still on the sheet. With staight edge in place, run a dull butter knife or the rounded backside of a razor blade through the center of the fins. This will end up being a rounded leading edge.

Cut out the fins and the main body tube wrap.

Cut them out just inside the black lines. This way you'll end up with white fins with no black edges.

In the picture you'll see how I only cut one side of the fin on the lines. The other half is oversize. You'll see why later on.

Now the fins are folded in half on that pre-crease line.

Make adjustments to the fold making the smaller side lines up with the black edge lines on the oversize half.