This is a tutorial/demo of the main techniques I use for hard surface in zbrush. I wanted to have a video resource for my students to refer to moving forward. Its a little long, but I broke it down into 3 sections, covering how to tackle 3 distinct objects you would typically want to create in production each with their own challenges. So in about 2.5 hours I cover it all, and its free so please have a look and let me know if you find it useful. Cheers!
Screen grab from the end of the video: