Making a 33 cm f/4.8 mirror on the Mirror-o-Matic 6: polishing the surface with a pitch lap

After 'super fine' grinding, I moved on to polishing the mirror surface, with cerium oxide. I also tested with Ronchi and Foucault tester for sphericity and quality of the mirror's edge. No hooks on the end of the Ronchi lines and bright diffraction bands on both sides of the Foucault image: so no TDE