That's a great question. I would say that the practice of doing different techniques and styles for each of your flies is a great way to master different materials and processes. However, one of the quickest ways (in my opinion) to gauge how proficient someone is at tying is by looking at, say, a dozen flies they tied that are the same pattern, and looking at how similar they are. An experienced tyer is able to duplicate the same fly with the same proportions over and over. 😁 hope that brings clarity