That kind of scares me. If you use RVP. The question would be what difference is there watching a baseball swing and a softball swing? I have watched many in slow motion with 14 frames on each. Different Styles , but the swing is the same. what that is.
I have access to a pretty good college level hitting coach. She told me never to teach anything to a player if you can't answer WHY you are teaching it. Why do we stride? Why do we keep our weight back? Etc. Especially with young players. So I agree with Mark, learn the swing and why it is done that way. I use her drills exclusively because she has explained to me why. I had to "unlearn" my baseball swing first and build my own swing to be able to show my team a sound softball swing.
I think the coach we use gets a lot of her drills and info from Cindy Bristow. Is it worth looking into Candrea's methods? The girls I work with are all 10U (7 to 10 YOA) I want to be able to give them the best information possible so that I don't screw them up. You know have me doubting our hitting coach, since she gave me the basis to teach the girls.