Right forearm on plane? Which plane?

[Martee]

According to Kelley

MOTION All the action of the Golf Club takes place on a flat, inflexible, Inclined Plane, which extends well beyond the circumference of the stroke – in every direction. The full length of the Clubshaft remains unwaveringly on the face of this Inclined Plane – Waggle to Follow-through.

[EdZ]

Martee - don't confuse "A" plane with "THE" plane

The old classic SNL skit... Hello, my name is A Whitney Brown, some day I hope to be "the" Whitney Brown

"The" plane is defined by the hands and the sweet spot.