To eliminate interference of the control cables, either offset the
servos a little or use two servo arms with upper and lower offset.
Trim the servo arms to a shorter length if needed.
Install the horizontal tail, mark and cut a slot for the elevator control
horn near the tailboom.
Trim the elevator control horn down to about 17-19mm from the
base to the hole. Make a slit on the rear side for inserting the cable.
Strongly recommended: make a keeper (lock) for the control cable
that will prevent it from falling off the control horn during accidental
hard bumps on landings. A tiny carbon rod and some cotton thread
work very well for this.
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