[Yoda]

Are there any changes to the low point plane line when there is a plane shift? If so, are there any ramifications?

The Low Point Plane Line and the Impact Plane Line are always parallel lines on the face of the same Inclined Plane. During a Plane Shift, the Plane 'tilts' to its new Angle around its axis of rotation, the immovable Impact Plane Line (1-L-18 ). Thus, the Low Point Plane Line is re-located to conform with the new Angle. That is, it moves more 'out and up' with a Shift to a Flatter Plane and more 'in and down' with a Shift to a more Upright Plane.

Regarding ramifications, the Geometry of the Circle (Clubhead Orbit) remains the same: Per 1-L-13, "The Clubhead travels Down-and-Out until it reaches its Low Point." But, since "Divots are taken 'Down and Out' -- not just Down" (1-L-14), a Shift to a Flatter Plane results in a more shallow Divot. Conversely, a Shift to a more Upright Plane produces a deeper Divot.