Even the launch lug got brushed with filler. It was stuck on a Q-tip for a painting holder.
The fin alignment fixture is set on the body tube and a fin slipped in for fitting.
Above the engine hook you can see the open root edge joint.
An emery board is supplied with the kit to cut an angle into the root edge. I used my sanding block with 220 grit sandpaper.
The picture on the left shows the new root edge angle.
On the right, the same fin with a much better root edge fit.
Be sure to sand the root edges in a mirror image on two fins.
The root edge on the third fin stays square.
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