I am refurbishing my Oday 28 and have just received from Rig Rite two halves of a plastic ball and two stainless steel clips. The ball, when assembled fits into a horizontal ring attached to the mast and a claw like fitting at the head of the boom somehow fits onto the ball...I think. This assembly constitutes the gooseneck. Does some one have a diagram of this Isomat assembly they can email or sell or else instruct me on how this is supposed to work. Would greatly appreciate any help.Joe