This week we get a special peak behind the curtain about how fly rods are developed. How long does it take to design a fly rod? How many prototypes are built? How are they tested? How are materials selected? And where do the ideas come from? Shawn Combs takes us into the depths of the Orvis skunkworks and tells us a few secrets (and withholds just as many) about how his team of engineers and technicians develop Orvis fly rods—specifically the new Helios 3 series. In the Fly Box this week, we talk about fishing emergers subsurface, the perils of using the wrong super glue on casting cuts, how long to let a bass popper sit, water temperature guiidelines for trout, fly fishing for crappies, a tip on keeping the trailing hook of a tandem out of the way when tying, leader lengths for stocked trout ponds, species-specific leaders, correct water depth for setting indicators, and how to fish multiple-fly rigs when the flies are barbless.