My shaft does not rotate in a circular motion. It is still. I took my old plastic sleeve and the new Highway Stars one and with the visor off and the sleeve only on I pressed both sides of the sleeves on each side of the tightening screw hole almost touching each other and it still seemed to move a little loose. There is no way that the tightening screw is going to make it as tight as I was pressing it with the visor off.
I did speak with Leslie at Highway Stars (who was very nice) and she had said that it was not a GM piece but made to GM specs. I am beginning to think that it might be my bracket where the plastic sleeve goes over or maybe even my headliner or visor. I did have them recovered and maybe the angle is wrong or something and pressure is being put on it to help it fall. I don't know. Leslie said that she was going to try to source a GM sleeve or possibly give me some other type of sleeve ( the black one for T Tops I think).
As for now I am able to wedge the right side of the visor on the headliner trim above the passenger window. Wife is happy and it keeps it up.