I have a couple girls who (to me) have a nice swing for an 11year old. BUT they swing like they are swinging through mud. just SLOW. leading to weak contact, so frustrating as they are my high % CONTACT hitters, but cant get anything hard, through the d. I need to learn how to coach a harder swing without TELLING them to swing hard... as that leads to head pulling, over swinging... more problems than it solves... IMHO. anyone have a gem of a drill or progression that can get them some power...? I work with them at the tee, about rotating, transfer of weight etc... but it isnt translating.