And the Answer is ... Will told Nate to hold the reel with his dominant (right) hand while casting. This adds a sense of balance and timing when you switch to your “off hand.” It's added proof for the notion that casting is more about timing and coordination than it is about power. You can transfer that balance and timing from your comfortable/dominant hand to your off hand, simply by cupping the reel with your dominant hand. Even if your shoulder is hurt, you can make short casts, in close, by keeping the rod close to your body, making very compact strokes ... and you can cup the reel without moving that hurt arm above the elbow. By simply holding the reel low and close to his body, Nate never had to lift his sore shoulder.