Golds calculations do work, as in you will always put it in or close if your designation of value to the speed of the dots AND your working out of the pace is correct (or slightly wrong) but, as a few have stated on here, you can only use this method if you have the time to work it out and you WILL need the calculator.
I have tried it out a few times when I was having a tinker with things or when I just couldn't see the putt for the life of me, and it is a very good way to make sure you don't 3 putt if not a definite to make the putt.
Also once you have used this method enough times you will start to learn how the ball will swing on certain grids without having to do a maths test.
However if, like me, you like to practice and learn most during a social 4 ball, then, unless you're a maths genius, you won't have the time to work it out.
A way I have discovered is quite accurate is to break the putt down into smaller putts. Each square represents 2ft x 2ft so I work out how far left or right i need to move the line to make each 4ft putt straight again. I think most on here are confident they can knock a 4 footer in, so break each putt into 4ft putts.
e.g. you have a 20ft putt 4in down with a left to right break tournament green. First I work out the distance (20-4-24%then add 1 foot to make sure it gets there, this always works for me) then start to break down the swing.
A 20ft putt will have 10 squares to the hole, therefore 5 4ft putts. Hold the left click on the marker and move the line whatever you think is required to straighten each 4ft putt.
If, for example, your 1st 4ft requires 1inch left, move the marker so the line moves 1inch along the 1st 4ft line, NOT 1 inch left of the hole, as the 1st 4ft is still 16ft from the hole moving the marker just 1inch from the hole will only move it about 1/4 inch along the 1st 4ft line. Then work to the 8ft line and move the marker again, and so on.
Again this is not an exact science. Your putt marker line will be straight and may pass through the next grid to the left as you work it out, but you have to remember the ball is going to curve away from the line so the grid the marker line passes through may not necessarily be the grid you need to work out. That is where memory, feel and just instinct comes into play.
Anyway that's my input. Gold has offered a brilliant formula for those who are willing to put the time in, but for those who want to click and shoot, this is a slightly less time consuming, but ultimately less precise method.
Happy lipping out!!!
JACKO.