With that said, I have been trying both a Felberg and a Cam Todd style. The one thing I have always found that helps with a Cam Todd style is to try putting with a belt around your torso and over the upper arm of your putting arm. This forces you to EXCLUSIVELY putt with weight shift and finger spring. While I was working on this I had a huge revelation about how weight shift transfers power to the putt. I imagined a spring or piston going through my back foot and leg and all the way up into my FRONT shoulder. In order to transfer the power to your arm/wrist/putter you have to extend the back leg and push the front shoulder forward (using the imaginary piston) before you spring your wrist. Your shoulder goes forward over and in front of your waist and the putter and THEN you spring your wrist and fingers.
Obviously we all do this to one extent or another but understanding how you are doing can lead to increased focus and a better putt. This also demonstrates that you can have a more powerful putt by bending you back leg more and getting lower over the back leg before shifting forward. The feeling, especially for a long jump putt, is like starting a race from a standing position. You get your weight down and back over that bent leg and then explode it forward. I hope this helps someone else with their putting. Good luck!
P.S. To transfer the power of the weight shift to your putt you HAVE to make sure your shoulder extends forward toward the basket BEFORE your arm/wrist/finger spring happens.

