The fin marking guide matched up!
Mark the three fin lines and extend them the entire length of the tube.
On the body tube, the root edge gluing line was scraped for better adhesion.
The small upper fins are glued in place.
The masking tape wrap helps line up the leading edges.
The short tube was slid over the upper rib fins, no glue yet.
This applied pressure to hold the small fins in place as the glue dried.
I thought the upper tube would completely cover the outside edge so it wasn't filled and sealed earlier. There was bare balsa below. I applied some CWF and sanded.
The dowel joint got some CWF to fill the gap.
The first coat shrank a bit. After sanding a second application of CWF totally filled the joint.
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