Estes Star Seeker (Tri-Pack) Kit #0866, Part 5, Fin & Launch Lug Assemblies

The dowels are glued to the top of the upper (unmarked) fins.

Two launch lugs are glued side by side.

Make two sets. I found it easier to make glue fillets now.

On the left, I've lightly sanded the glue line for better glue adhesion. 

On the right, the dowel fins are glued with that spacing overhang on the outside.

Be sure to make two "mirrored" fins.