Bear J, on shorty breakers I ALWAYS, hit early or late, in the direction the green is sloping FROM. ie. if a putt is to break left....miss the dinger mark right, how much depends on severity of the break (that comes with experience). NEVER miss the mark on the side the break is moving to...won't go in in a million years. Using the aim arrow is for gross alignment, but I've found that the timing, (l/r) of ding mark, is crucial for the fine tuning of a putt. This works for long putts also. Hope this helps Good Golfing Friend Good golf! C