As I've been reading more and more about grinding HSS turning tools. One of the most complete ones i've seen is the following. http://www.steves-workshop.co.uk/tips/toolgrinding/toolgrinding.htm Specifically this picture. I see information around all the different relief and rake angles for different materials, but not the side cut or end cut angles. Does the side and end cut angle matter and is there a recommended angle? In regards to all of these angles, do these angles all assume the unground portion of the tool is 90 degrees to the work?