How important is it and what effect does it have on your playing? Doe sit have any effect at all? My hand position was corrected when I was in the 7th grade by my band director, she told me that if your hand position wasn't correct you owuld not be able to play up to your full potential. She never explained why and I have always wondered. And I'm not talking about either hand in particular. My left hand was the one that was corrected, but I would like to know the advantages of having correct hand position for both, if there are any, and how it helps you play better, if it does.