[O.B.Left]

FACT;
A golf club, swung on a flat inclined plane in a circular motion, generates NO force, cf or otherwise, that will align the face perpendicular to the base line or at any other place on the plane. NONE!
The Hungry Bear.

Did you mean to say that? "Perpendicular to the base line" sounds like Vertical to me given any inclination to the angled plane. A truly vertical plane angle would be vertical and angled however. If you know what I mean.

Angled would show the club face square to the plane or visually the arc of approach , horizontal would see the face roll open and closed along the arc of ... ah forget it. Maybe your "any other place " covered all the possibilities . I dunno.