There is a longer rectangle left on the fin mounting sheet. This is used to fill the gap on the split tube of the payload.
A two piece laminate wasn't quite thick enough to be even with the to surface. I ended up using a three piece stack and would sand it down to surface.
The three layers of 110 lb. card stock were glued in place using white glue.
The strips were glued long and trimmed off even with the end of the payload section.
To stiffen it up, a layer of CA was applied with a Q-tip. This makes the surface hard and easier to sand without any raised paper fibers after sanding.
After drying the filler strip was sanded with 400 grit on a block.
CWF filler followed with a final sand.
After a spray of primer filler, the patch is almost gone.
A smooth sanding and one more coat of primer should fill it in.
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