This story was originally published in December 2019. Fly tiers will spend the coming months stocking up on flies that they’ll use all summer long. Even those fly fishers who don’t tie their own will also spend a fair amount of time planning adventures for the coming months. As we move toward another Maine winter, I sat down with Don Corey, the proprietor of the Annika Rod and Fly Learning Center in Brewer, along with veteran tier Ernie MacDonald, to ask for some fly tying and fishing “commandments” that could pay off for tiers and anglers. And as always, they were eager to help their fellow fly fishers.