Diablo, If you want to save some money and a little weight you don't really need the threaded coupler #336 or the ball links #259. Just Z bend that end where it connects to the servo arm. The 4/40 hole eats up those little servo arms. Hi Tech has some nice fat ones. I used HS-605BB on ail. and elv. and HS-645MG on rudder. Standard throttle. Joe