Great Planes Spitfire 40 Kit - GPMA0179 - Manual (Page 22)

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3. Using the hole in F2 as a guide, drill one 1/4" hole all the
way through the leading edge and wing joiners, angling the drill
toward the bottom of the wing slightly to clear RB.
Note: Use a
6" long, 1/4" drill bit or sharpened brass tube.
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4. Round one end on each of the 1/4" x 4-1/2" dowels.
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5. Glue one 1/4" x 4-1/2" dowel in the wing, leaving 3/8"
sticking out of the LE. Repeat for the second dowel.
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6. Mark a centerline on the die-cut 1/8" ply bolt plate BP as
shown in the photo. Sand a taper on the leading edge and ends
of one side of BP. Flip BP over. Using a razor saw, cut 1/2 way
through the other side of the bolt plate so it can be bent to
match the wing.
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7. Stick a T-pin through the center of the aft end of the fuselage
bottom. Tie a string to the T-pin. Pull the string to the TE of the
wing tip and put a piece of masking tape on the string at the
wing tip. Mark an arrow on the tape, then slide the tape on the
string so the arrow aligns with the wing tip. Swing the string over
to the other tip and see if it aligns with the same point. If
necessary, shift the wing and mark the location of the tip by
adjusting the position of the tape on the string. Do this until the
arrow on the string aligns with both tips.
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8. Glue BP onto the wing, aligning the trailing edge with the
fuselage.
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9. Holding the wing firmly in place on the fuse, and using the
holes in the wing bolt plates as a guide, drill one #7 (or 13/64")
hole through each wing filler block (inside the wing) and the
wing bolt block, (inside the fuse), keeping the drill perpendicular
to the wing bolt plates and centered in the holes.
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10. Remove the wing from the fuselage and enlarge both holes
in the wing only to 17/64" (or 1/4").
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11. Use a 1/4-20 tap to cut threads in the bolt block in the
fuselage. Hint: A cordless drill makes a great tap driver.
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