Add new parameter to define the number of positions of a rotor, what's the point?

http://sourceforge.net/p/openpli/enigma2/ci/2514ce02e0b55f61b13cdbc5f260329bc1c54820/

"Add new parameter to define the number of positions of a rotor", what's the point? What useful function does this serve? And why 49?

Also, tuningstepsize, turningspeedV, & turningspeedH don't make any sense for anyone using a dish moved by an actuator as there is not a linear relationship between the actuator count and the number of degrees moved.