Proper fitting plays a pivotal role. I do believe in getting the forearms on the same plane as the clubshaft, just as in the full swing witht the right forearm, so the arms and putter shaft are moving in the same plane. It is a mechanical disadvantage to not have the forearms in plane with the putter shaft because of the arms and putter moving in different planes.
.
vj: Can you go into uour set up ? do you like a lot of bend from the waist? Do you like to have the ball directly below the eye line ? What putter length IYO is right for most people?