To find out which putter type fitted my stroke, I visited a putter lab which used cameras and computers to check every aspect of my stroke. My stroke is a slight arc (I use the Ping Nome/heel shaft which suits my stroke). I had the lie angle and loft adjusted, he also shortened the shaft length to 31 inch, (the average length of a Pro's putter is only 32 inches, check out Phil Mickleson) and fitted a counter weight inside the grip end to improve the balance. Then we tried all types of grip until I felt comfortable with one. My putting has improved as a result and I feel a lot more confident on long putts. The whole session took nearly an hour and cost £90 inc all adjustments, shaft counter weight and new grip (Winn Jumbo Lite). Well worth it just for the confidence boost. I would highly recommend it to everyone who wants to improve their putting.