E-flite Ultra Stick 25e ARF - Manual (Page 27)

2
  3. Thread a clevis onto the 22 1 /
2
" (572mm)
pushrod wire for the rudder. Slide the pushrod
into the pushrod tube and attach the clevis to the
rudder control horn.
  4. With the radio on, center the servo first. Use
a felt-tipped pen to mark the pushrod where it
crosses the servo arm.