[whip]

Yes, but homer apparently found the value of a swing plane structure. For golfers who have no concept of Swinging on plane a visual like these structures is very helpful. The body must also learn it's new locations, and motions to accommodate the plane regardless of if they are precisely sensing the sweetspot plane. The c-plane is most accurately used by adjusting it to match your sweet spot plane angle and swing parallel to them, if you do not hit them and swing through air u have swung on plane, for some though it is very helpful to swing directly on the pads to get a feel.