DD1 (RHP) throws screwball as an inside riseball. She does step left and throws a riseball inside. Tried to get her to just throw a fastball inside but she insisted that she feels better throwing a riseball inside so I let it go and seems to work pretty well. Also tried to get her to throw a drop ball same way but she pushes back and says the riseball is what she is most comfortable with for the screwball. I have learned after all these years that she actually knows more than I think and if it works for her then it works for me.