Here while back, I found out my left shoulder was in bad shape with arthritis and, rather than quit shooting, I switched to lefty. Knowing how to use my arrow as an aiming reference has made the transition pretty simple. I'm still not much good beyond 15 yards, but am making good progress. I tried instinctive when I first switched. It was scary how bad I was missing at 5 yards!

On a related note, I've certainly learned why Fred Bear leaned his head and canted his bow so much. Shooting lefty with a dominant right eye, you've GOT to do that to get the arrow under your 'good' eye.