Of the many excuses we invent as to why we don’t convert our casts, few hold as much water as those that account for simple biology. Time with a rod in hand gives us perspective of fish behavior, but changing what we do, that has in days past worked, is easier said than done. It’s why, ‘which fly is working’ is almost a direct result of how often we throw that pattern. It’s what makes festivals like the TOPS Corporate Challenge a key indicator. The first leg of this benchmark…