FFS, can you please explain what "extension of Body" means?
See if this helps .....
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Joey Myers talks about centripetal and centrifugal forces. One is drawing inward (centripetal) and one is outward/fleeing (centrifugal). The same way a merry-go-round works. The physics should result in extension without trying to hard.
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Just received this today,
https://hittingperformancelab.com/s...m_medium=General-List&utm_campaign=2019-02-12