Since many folks have difficulty with a proper pivot, maintaining the centered head and having a proper hip motion I wanted to suggest the following image:
Take your address position.
Imagine moving the left shoulder in a straight line down towards the right big toe, letting the power package move along for the ride and the right hip respond freely (it will move straight back).
While you certainly don't want to over do the feel (which would give you pivot control, rather than hands control), this can be a nice shortcut to learning a good pivot.
the caveat with this drill is that you may tend to bob/lower the head slightly, so check in a mirror as you do it. Establish your impact fix, and keep a stable head position.
This is the type of drill that will give you that "breaking down a wall with the left shoulder" type motion (see EdZ drills).
If you are a chronic over the topper, you might also find benefit in feeling like you hit the ball with the back of the left shoulder as you start down, which will tend to help you keep the sequence and zone 1 power.
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