Estes Cosmic Interceptor Build, Part 8, Fitting The Fin Pieces

When fitting the O brace part with the angled end against the N part, it came up short in the back.

I cut new longer O pieces using some of the leftover balsa.

While dry fitting the S brace, the O piece was glued on. 

The O piece was a hair wide. Masking tape was applied to protect the S brace while the overhang was sanded down.

Here's the finished O piece, fitting tight against the M and N pieces of the wing.

The wing is then glued together on a flat surface with weights.