Great Planes Extra 300S 40 Kit - GPMA0235 - Manual (Page 28)

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5. Cut a 3/32" x 3" x 24" balsa sheet into two 12" long
pieces. Trim the edge of one of the sheets so it will not meet
the fuselage side but will extend past the bottom stringer
when it is bent around the formers and stringers. Use thin
CA to glue the sheet to the center of the top middle
stringer.
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6. Wet the sheet with the water and alcohol solution,
then carefully test bend it into position. Apply more water
and alcohol if needed to bend the sheet.
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7. Use masking tape to firmly hold the sheet it in
position, then glue it to the stringers with thin CA from
inside the fuselage.
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8. After the water has evaporated remove the tape, then
fit and glue the other sheet to the fuselage.
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9. Use your bar sander and 150-grit sandpaper to sand
the sides of the front deck sheeting so they are even with
the edges of the formers. Trim the ends of the sheeting so
they are even with F-1T and IP.
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10. Locate the 1/4" x 3/4" x approximately 22-1/2" balsa
stick (it was 24" long but you used a little piece for the fin tip
while building the tail surfaces a while back). Cut it into two
equal length pieces for the front deck side stringers.
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11. Use medium CA to glue one front deck side stringer
to each side of the fuselage. Sand the side stringers so
they blend the sheeting and fuse sides together as shown
on the fuselage plan.
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1. If you have not already done so, make sure the stab
and fin are final sanded to a smooth finish as it will be a
little more difficult to do so after they are glued to
the fuselage.
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2. Mount the wing to the fuselage, then position the stab
on the fuselage. Stand about six to ten feet behind the
model and see if the stab is parallel to the wing. If
necessary, use your bar sander to make adjustments by
sanding the stab base until the stab is in alignment with
the wing.
Mount the Stab and Fin to the Fuse
28