[bear]

Brendan, look closely at the base of the sockets where they are attached to the shafts, there may be a clip that goes around the shaft and a straight piece that goes into the socket. Those are the clips that have been referred to. Make sure you take them out before you try to snap in the ball to the socket. The other style has a pair of holes in the top of the socket and the pin goes through the two holes. HTH.