Working on my ZBrush hard edge skills. Initially sketched the entire bust from a polysphere to get the big shapes roughed out. Then went and separated it all into subtools. After that I've been cleaning it up, adding detail and panels with Slice curve, panel loops, clip and trim brushes, subtool ops and a few alphas. And lot's of HPolish and Claypolish with masking. All all still Dynameshes, no Zmodeller.