Self Putting Evaluation 

In addition to correct reading of greens (target line and speed) which comes from a lot of practice, a good putting stroke 
starts the golf ball rolling along  your selected  target line.
If that does not happen, that is, if your ball starts to left or right of where you are aiming, then some corrective measures are needed either in technique or in equipment, or both.  Some possible putting improvement tips are listed below.
Use a golf putter (size, type, length) that suits your physique; do not contort yourself to the putter.
Use a golf putter that sits correctly on putting green surface (head / shaft lie) with center of putter face touching the ground, not the heal nor toe.  Adopt your stance and have someone take a picture for your verification.
Upon taking your stance, if you play with ball located significantly forward of center of stance, use a putter with less face loft.  If you play with ball located significantly behind center of stance or if you lean the top of shaft forward (towards target line), use a putter with more face loft.
If your golf putting stroke is too “handsy”, try a heavier putter or try a shoulder swing. (See also #19, #20, #21).
If you have a jerky stroke, try a heavier putter or a very thick and soft grip.
A light grip pressure will promote a smoother stroke.
If using a belly type golf putter with top of shaft leaning forward (towards target line), use more face loft.
If ball bounces when stroked, especially on forceful strokes for very long putts, adjust ball position or face loft (see #3 above).
If you regularly pull strokes: (See also #18).
a.  Your backswing may be starting outside the target line causing a towards-the-inside-of-target-line forward stroke and a closed putter face position at impact. (Diagram A). Have someone video this for your verification.
b.  Your backswing may be square but you may be rotating your shoulders during forward swing causing a towards-the-inside-of-target-line stroke and/or a rotation of putter face into a closed position at impact. (Diagram B). Have someone video this for your verification.
Verify alignment and swing path such that at impact the golf putter is on line and square to target line.  (Diagram C or D).
Set up for each of 3 - 4 various lengths straight putts, align yourself and golf putter face and have someone take pictures (from rear extension of target line) of each set-up to verify your alignment or mis-alignment.  Many people visually mis-align their body or putter, or both.
What seems aligned to the eyes is not necessarily aligned to the target line.
a.  Align golf putter face down target line first, then set body.
b. Align body (feet, hips, and shoulders) by setting them perpendicular to putter face and parallel to your target line, and repeat #11 above.
c.  Use a putter with strong alignment features.
As another option, check your visual alignment by alternatively closing one eye at a time and verifying if alignment appears to vary from view with two eyes open.  If one eye view provides a correct alignment, then use that one eye as an alignment-pre-check prior to putting.
If all else fails, have a custom putter made with a strong alignment feature set off-square from putter face 1/2, 1, 1 1/2 or 2 degrees, compensating for the visual mis-alignment.  (For illustration purposes, the blue putter on diagram below has the angle greatly exaggerated.  In reality, a one (1) degree angle (red putter illustration) is barely noticeable.)
Rotational “T” Tool for Measuring Visual Alignment.
(For local-golfers only in the Greater Philadelphia, South Jersey and Delaware area).
For others, print out the “T” on “Alignment Verification Cut-Out” in this document.
Relative to putter weights:
a.  Golfers come in all sizes from a small person under 100 lbs to a large person closer to or in excess of 200 lbs.  Yet commercially sold putters (for each given type or brand) are the same weight for everyone.  An appropriate putter head weight suitable for your physique should be used (see items #4, #5, and #19).
b.  Shaft length (and grip weight) minimally affects putter swing-weight.  [With drivers and irons, a 1” change in shaft length significantly affects swing-weight / swing-speed.]
Relative to Face Texture:
When struck with a putter, a golf ball will initially skid slightly before it actually rolls.  Reinhard Putters recommends a smooth putter face at sweetspot zone to promote a quicker start of rolling.  Conversely, textured and grooved faces will increase skid and even provide some backspin on harder hit putts.
Miscellaneous tips:
 a.  Concentrate on speed.  On short putts, stroke putt to pass hole 1-2 feet if missed.  On long putts, stroke putts to ‘die’ at the hole.  Except on very sloped side-hill lies, your will rarely miss a putt 10 feet to left or right of the hole, but it is very easy to end up 10 feet or more short or past the hole.
b.  As quoted by many:
“Practice, practice, practice - but practice does not make perfect. - -  Perfect practice makes perfect.”
Miscellaneous Alignment Alternative:
a.  Make a straight line mark on golf ball (A) and place it perpendicular to target line (B).
b.  Standing upright behind the ball, use your golf putter (C) horizontally above waist level to check alignment mark with target line (B) verifying that mark is perpendicular (D) to shaft / target line, and not at a skewed angle (E) - (F).
c.  Place golf putter behind ball and align clubface with alignment mark (G).
d. Now concentrate only on making a good  stroke with the correct speed.
The Backstroke should be either straight back or with a slight inside curvature (as also described on #10 above).  If your backstroke swings outward (red), it may be due to standing too close to ball, which may subsequently promote a pulled forward stroke.  If your backstroke swings too much inward (blue), it may be due to standing too far from ball, which may subsequently promote a pushed forward stroke.
Therefore, if your ball regularly starts rolling offline from where you are aiming, changing the ball-to-body distance may help.
Straight or Breaking Putt
Golf Putter Weight Tests:
You may tests various putter weights to assess what weight gives you maximum control and feel.  This can be simply done by purchasing a pack of 1/2 ounce lead fishing sinkers from a sports shop.  Place pairs of 1/2 ounce weights secured with duct tape and spaced evenly at each end of your current putter, starting with 1 ounce and progressing up as you wish.  At some point, you may find a weight that better suits your physical build, control and feel.
Weight Comparison References:
  • A 36" long stainless steel shaft averages around 4 oz. in weight.
  • A grip averages around 4 oz. in weight.  Some grips are as light as 2 oz.  Large ones may approximate 6 oz.
  • A commercial Odyssey 2 Ball  brand putter that I own has an overall weight of 19 1/2 oz.  Deducting the shaft and grip, that results approximately in an 11 1/2 oz. head.
  • A commercial Rossa brand putter that I own has an overall weight of 20 1/2 oz.  Deducting the shaft and grip, that results approximately in a 12 1/2 oz. head.
  • The Marble Putter  herein was designed and built with an 11 1/2 oz. head, for an overall "light" weight of 19 1/2 oz.
  • The Reinhard Putter  herein was designed and built with a 15 oz. head, for an overall "heavy" weight of 23 oz.
  • All other golf putters herein are between those "light" and "heavy" ranges.
Shoulder Stroke VS. Wrist Stroke:
A proper golf putting stroke begins by setting arms and hands at address (A) in a “Y” position (blue lines) relative to the club shaft.
In a shoulder stroke, the shoulders, arms and hands pivot from upper chest level (point D) as one unit during back swing (B) and forward swing (C) while maintaining the club shaft in the same “Y” position.
In a wrist stroke (which may or may not include shoulder turning), the hands pivot at wrist (point d) during back stroke (b) and forward stroke (c) where the shaft is not maintained as one unit in the preset “Y” position.
A wristy stroke makes it difficult to have a consistent squared-at-impact stroke.
A heavier putter may help tame a wristy stroke.
Shoulder Stroke
Wrist Stroke
Grip Pressure - Clubface Rotation:
Grip pressure "ideally" is kept constant throughout the putting stroke.  However, practically all golfer's brain will instinctively increase grip pressure to accommodate the physical forces generated during a golf swing.  This applies to putting as well, albeit to a lesser degree.  The grip pressure will vary from a lighter pressure at the stationary address position to an increased pressure during the dynamic back and forward stroke, usually greater on the forward stroke.
>> This change in pressure during the stroke may cause clubhead rotation (A,B) resulting in off-line putts.
One way of checking for this is as follows:
1.  Address ball with your preferred grip and pressure.
2.  Without changing the grip position, slightly loosen the pressure of both hands.
3.  Repeatedly tighten and loosen the grip pressure of the left hand only and observe if there is any clubhead rotation.
4.  Repeat same procedures 1 and 2.  Repeatedly tighten and loosen the grip pressure of the right hand only and observe if there is any clubhead rotation.
5.  Identify which hand is the "problem" hand that causes clubhead rotation.​  Your "problem" hand rotation will most likely correspond to your predominant pattern of mis-hits, either closed face / pulls or open face / pushes.

A solution to this:
1.  Address ball with your preferred grip and pressure.
​2.  On your "problem" hand only, raise the fingers (not the thumb) from their second-joint position around the golf grip to a position where mostly the tips of the fingers of that hand are on the golf grip.  Maintain other hand as usual.

>> This should lessen the overpowering tendency of the "problem" hand and eliminate or significantly reduce clubhead rotation during the stroke.
Alignment Verification Cut-Out
Print the " Tee" at approximately 10" in lenght on an 8 ½” x 11” sheet and cut out the “T” along the dotted line.  With double-faced tape, adhere it to a piece of cardboard, such as the back panel of a cereal box.  Cut cardboard along same dotted line.  Then very accurately, cut bottom along "red" dotted line (between 2 black lines).
Address putt and align putter (with golf ball) towards the center of hole / pin “with both eyes open” and with face of putter at exactly 10 FT from pin.
Hold that position carefully.  Have someone remove golf ball and place the cardboard “T” on ground - - centered and squared against face of putter.
Step away without moving cardboard “T” and estimate your alignment / mis-alignment by viewing an ‘extension line’ of the cardboard “T”.
If mis-alignment occurs, measure the sideways distance from the ‘extension line’ and the center of the pin.
( ?? Inches ).
Mis-alignment ratio is about 1/2 degree for every inch of sideways deviation.
Repeat steps 2-5 for “right eye only open, and left eye only open”.
If there is some degree of misalignment, you will now have become aware of it and can strive to correct it and hopefully putt better, which is the ultimate goal.

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