For more info go here:
dslrvideoshooter.com/episode-40-using-a-follow-focus-with-magic-arms
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Parts Mentioned:

Cinevate Base Plate (Option 1):
tinyurl.com/77lftzj

Affordable Manfrotto Style Base Plate (Option 2):
tinyurl.com/7cpqhxt

Friction Adjustable Arm:
tinyurl.com/73jhd9g

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