The fins were filled with CWF and sanded.
Here I turning the fin sides away from a bright light to see if there is any remaining CWF brush marks or grain that needs sanding.
Enlarge the picture and you can see the brush marks that have to be taken down. Any slight remaining balsa grain recesses will be filled with upcoming primer/filler coats.
Primer / Filler will be sprayed and sanded on the body tube before the fins are glued on.
The fins were dry fitted and traced around the leading and training edges with pencil. This will be a border outline for the masking tape strips.
Thin strips of masking tape are applied down the root edge gluing areas. The tape strips are a bit wider than the slots so the glue fillets will adhere after the primer/filler is sanded down.
A painting dowel with casings was fitted into the engine mount.
Paper towels strips were pressed into the open area behind the rear centering ring. This will keep paint out of the engine mount.
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