Hangar 9 Beast 100cc ARF - Manual (Page 12)

12
 Step 4
Put the nut on with threadlock and tighten
them on both sides. Install the control horn so
the distance between the hinge line and pivot
point of the horn measures 1 1/4 inch. Test
this by installing the arm, if one control horn
is off, you won't have a straight shot at 1 1/4
inch hole of the arm.