{This ruler was initially posted by Oilyrag I believe so, you get the credit for finding this. I just used it in a different way that I think will be helpful for anyone that is having problems determining the distance on their swing meter for putts.}
This is for a custom putter ruler. If you wanted to know how far to pull back on a putt that is 5 feet on a 15 foot putter, 12 feet on a 25 foot putter, etc., this will help.
Go to the link below to get the ruler. It's the middle option. Follow the steps below.
https://sites.google.com/site/rulerhelp/
Select the middle option, or 'Portable Version'. Once you unzip it, click in the folder and copy the execute file to your desktop for easy access. Now, what I did is explained in the steps below.
Here are the steps for making a custom ruler for putting.
1) Open the ruler.
2) Shrink it down. To shrink it down, move cursor over to left edge until you see the arrows. (First, line it up by left click dragging it underneath the swing distance meter so you know how much to shrink it.) Now, after getting the double arrow again on the left side of the meter, left click and hold and shrink it to the right until it is basically the same width as the swing meter.
3) Change the unit of measurement. After shrinking it to fit, right click on the ruler and select 'Options.' Then select the second option, or 'Calibrate.' This will bring up units of measurement. Select 'Centimeters.'
4) Adjust the distance between centimeters. Now this will sound weird but follow to finalize. Just below the units of measurement, percentage and pica, there are left and right arrows. (We're still looking at the options screen, not the ruler itself). If you click the Right Arrow, I believe, a few times, you can change the ruler so that it only lists 10 centimeters. (The distance between centimeters is not actual centimeters anymore, but larger, but for the purpose of what we're doing, you only have 10 equal measurements on the ruler at this point) You may have to play with the arrows either right or left, until you only have 10 (TEN) equal measurements on the ruler at this point.
Do you see what I did there on the ruler? I'm sure most of you see what the point of this was. It gives you 10 exactly equal measurements so that when you putt, each "centimeter" numbered measurement is equal to 10% of the total power of the putter you have selected (15,25,30,50,60,100, etc.).
***One caveat to this is that it really only works on putters because when you have other clubs selected, the swing meter gets a bit longer and it'll be off. I think it's because the putter gives you that option to change distances from 25 to 50 etc. and in essence, shortens the meter down. However, this ruler is for putting. And also, this is not cheating. You still have to determine the distance of the putt, whether to aim or not depending on your style, and hit or miss the ding early or late. This just helps you figure out how far back to pull the meter once you figure the distance.
The best part is once you have it sized, it should stay that way even if you close the ruler out. That way you just open up the ruler from your desktop and Oila!, you've got your putter helper. You would just have to move it where you want it underneath your swing meter on putts.
If you are having problems understanding the steps just let me know. I know how sometimes you have to do it yourself to actually have that, "Ah. I see," understanding. The good news is once you're done, it should always be set the way you want it.
Good luck all. Good shooting.