When establishing tempo, make sure your right shoulder does not move out, but under and forward.
The Four Tee Drill helps to with setup, alignment, roll and your putting stroke.
The palm of the hand and fingers are important when gripping the putter.
The amount of loft in your putter can affect how the ball comes of the clubface. Changing your ball position can instead of having multiple putters with different lofts achieve the same outcome.