The off arm in the disc golf backhand throw: Arm Differential

What is the off arm used for in the disc golf backhand throw? How do we keep the right arm raised during the throw? How do we bring the back knee in during the throw? How do we keep our weight over our back leg? The arm differential - whether the arms go back together and forward together or go in different directions - provides answers for these long standing questions. My research, experimentation, and experience lead me to the conclusion that increasing the arm differential will provide the best return on your invested time and effort as you work on your disc golf backhand form.