IMO the "Rocker Stops" are an important detail.
wellphyt said:
"It also seems like this device would hinder the uncoil."
well-
you might think of this in terms of the difference/similarity between the swing and overhand throw.
In the overhand throw, I think it helps for maximum power to learn to throw off the mound the way pitcher's do. They have to accentuate ability to hold coil falling down hill, then learn to take the unloading forward over the front foot.
unfortunately, the forward part is what gets ingrianed in baseball pitchers and is part of what usually makes them bad hitters getting to front side too soon.
this is a big advantage for female pitchers who are usually the best athlete on the team when young and stay back and throw off flat ground and know how to coil and resist with upper body so are often the best hitters as well.
in any case, for hitting, you need to learn to "stay back" by balancing around the rear hip and not be forced to get to the front side early.
used as a device to encourage rear hip control/balance, this could help by learning to retain coil in spite of falling down hill/learning how to "stay back" the "right' (HLBB) way.
Tom you just hit the nail on the head with your statement. That is another aspect of the BB product. It will allow you to balance around the rear hip and promote the feel of unloading the hip while moving forward to create momentum. Great observation on your part.