We have had pc's teaching my daughter to step a foot or so to the left of the power line when throwing the screwball and we now have one that doesn't teach that. Personally I thought she had better movement on the pitch when she stepped to the left of the power line. I think it helped take some velocity off and helped the pitch move! Now throwing it and staying on the power line it comes in harder, I can see the good rotation...but not impressed with the movement. The new instructor claimed opening up was "old school" and the modern softball pitcher doesn't step off the power line for the screwball. She also claimed stepping to the left of the power line tipped the hitter of a incoming screwball.....your guys thoughts?