[Mathew]

Been noticing lately the use of some terms that make me wonder if we are talking about the same thing....

I originally voted for - sometimes the same - sometimes not.... it seemed to be instinct but the question was bugging my mind for a while...

But ive changed my mind after thinking about this a little - the plane line is the base of the inclined plane where it goes into the ground (as depicted in 1-L - The machine concept). The flight line is parallel and slightly in front of the plane line. The clubshaft rests on the inclined plane which is slightly in from the sweetspot ... I think he even says they are parallel in one of the observations in 1-L - if they are parallel they are not the same....

The ball always starts from that parallel to the plane line location - so they can NEVER EVER be the same.... if you draw a line wiith two points on either end - one point is always OFF the plane line....no matter what the intended line or type of flight may be (even if the ball lands exactly on the plane line when it drops) - means they are not the same

Infact if you truely want to stroke having the plane line and flight line the same - welcome to the world of the shanks