Gadzilla4: putting guide
That is the key. It never accounts for anything but distance (not elevation changes and breaks).
You have to learn what power is actually required for a putting scale (the equivalent distance).
There are a number of posts here about putting - a first look might be at the "Putting Tips" in the FAQ over to the right of this post --------->>>>>>>>>>>>
You can start at the front (old) and then maybe look at the last few pages.