Great Planes Giant Citabria 30cc/EP ARF - GPMA1435 - Manual (Page 13)

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4. Install and then remove a #4 x 3/8" sheet metal screw
into each of the holes. Apply a drop of thin CA glue into each of
the holes to harden the threads. Once the glue has hardened
secure the control horn to the elevator with the four screws.
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5. Use the same technique for the remaining elevator half.
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6. Install the grommets and eyelets onto two servos. Cut
three arms from a four arm servo horn, center the servo and
install the horn onto the servo. Install a 4-40 solder clevis into
the outer hole in each of the servo arms. Place the two servos
in the servo tray with the servo arms aligned with the pushrod
wires. Drill a 1/16" [1.6mm] hole through each of the mounting
holes in the two servos. Install and remove a servo mounting
screw into each of the holes you drilled. Apply a drop of thin
CA glue to harden the threads. When the glue has hardened,
secure the servos with the screws.
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7. Center the elevator halves and the two elevator servo
arms. Using the solder clevis as your guide, make a mark on
the pushrod wire where it needs to be cut. Remove the clevis
from the elevator control horn and remove the pushrod from
the fuselage. Do this for both pushrod wires.
Once the wires have been removed cut the wires on the
marks you made. Solder a 4-40 solder clevis to the wire
using the same procedure used on the ailerons. When the
solder has cooled remove the threaded clevis and 4-40 nut
from the threaded end of the wires. Slide a silicone clevis
keeper onto the solder clevis. Re-install the wire through the
front of the fuselage into the pushrod guide tubes. Attach
the clevis from each pushrod wire to the outer hole of the
servo arm. Re-install the nuts and threaded clevises onto
each wire, adjusting them so that the elevators are centered.
Then secure the elevators with the clevises.
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8. Install a 4-40 nut, clevis keeper and 4-40 threaded clevis
onto the remaining 4-40 x 48" [1220mm] threaded wire.