Another case that I like even more involves a little more work. I have built some spinning rods on very light fly-rod blanks (9-foot, 4-piece, 4-weights). That means a cork, spinning-style reel seat and very lightweight spinning-style guides. I use these for fishing micro-jigs for trout on medium and large rivers. With an appropriate ultra-light spinning reel, it's easy to cast one-eighth- to one-sixteenth-ounce jigs a very long way up and across the the current.