Got a question. Hope you will answer. Do you ever have to erase, like any of the details you place on your drawing? It all looks so perfect. Do you get frustrated and bored to add those wonderful shadings, lines, and highlights? Because I literally lose focus and go through pain in my hands. And is this process the best way to do this type of drawing because there are soooo many fine details? Is it done this way (completing one area before going on to another) because it keeps your focus going or your attention to details does not fade?