One of my Super Record posts would slip forward, not backward. The top part had been buffed shiny like the one in the picture. Another one I have was not buffed, and does not slip. I took the buffed one apart and sanded the places where the cradle contacts the top of the post with #220 grit emery cloth, then reassembled it without wiping the left-over emery grit from the post. It's an old machinists' and mechanics' trick. The grit gives some traction and discourages slipping. Seems to be working. Were some of the Super Record posts polished at the top by Campy, or is that a user modification?