you can use a du-bro #518 (i think that's the right #) pull-pull kit. that & a h/d arm, or a WHEEL (better), to fit your servo. some small plastic tubing for the leadouts, and small heat shrink to seal around the cable, on the outside of the radio box. cut your cable long, when you run it through from the INSIDE, heat the heat shrink with only about an inch of cable sticking through. that way, when you melt/distort the plastic sheath on the cable, you just cut that 1" off & finish rigging. & a couple of clevis connectors for the motor end should do ya. if i used an arm, i think i'd nut & bolt it, never like the sheet metal screw deal......... this is what i've been using, stays nice & dry, lord knows, i've 'tested' it enough!