Any Home Switch Postion between 0" and the Start Match Position would result in the die referencing to 1/2 of the Die Travel (Auto) value.

There is a function that finds the Rotor angle for a given Die Position in inches. It is given an initial guess angle and iterates to the actual angle. The function made an assumption about the initial guess that was resolved by adding an absolute test rather than assuming the error in the guess would always be positive.