If separation point occurs prior to low point and low point can be adjusted so that it is forward enough that the ball is gone before the clubhead makes contact with the ground?
In 7-6 Homer and I am reading into this states that the Basic Plane Angles can be adjusted between the elbow and shoulder to accomodate the heel/toe alignment...
That seems to indicate that in my words, that the lie angle of the club should be accomodated by the golfer. To extend the logic, since a golfer rarely has a flat lie (unless on a tee) it would seem to me that a better golfer would be better off in being able to make the adjustment to the the golfer's basic plane. Granted golfer with unusual measurement, short legs and long arms or long legs and short arms, a general fitting would seem to work.
Unless i missed it, the shaft flex will also effect toe droop in the swing which will in effect affect lie angles.
Same swing with different flex shafts (same shaft though) equated to different lie angles by 1.5*.
one had more toe droop than the other.
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Here's another for you:
Old average driver swing speed = 105-110 max around 112
Above was with a shaft that was too light and too weak. My computer wouldn't let me swing as fast as i wanted cuz i would overpower the shaft.
New shaft, heavier and much stiffer:
New average swing speed = 111-113 max around 116 (even got it up to 118 one time but sadly once one time )
So you can see that equiptment can drastically effect what kind of swing you put on the ball. For instance i have been too lazy to get my lie angles bent flatter in the short irons. They are currently 1* flat throughout the set. The short irons need to be 2* flat. I have to incorporate a bit of a bent left wrist at the top of the swing to help keep the club open so i don't draw the short irons too much.
I could go on and on, just make sure you find a knowledgable fitter and it might even help your game.
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I'm not a TGM or PGA certified Pro, but I did stay at a Holiday Inn Express last night
Lets assume that your swing is in top form and the you contact the ball 1.5" before low point and that separation occurs .75" before low point. You are still moving towards the 'fully uncocked' left wrist which you reach when the club contacts the lie board. If you go completely by the information on the sole tape, you will adjust your clubs too upright for the lie angle that was present thru the separation.
If you left wrist reaches fully uncocked at low point, your divots should be slightly 'toe deep'at low point to have the correct lie angle for impact.