" changes in greend speed"
Champ 13 green speed : Basic is ,...0 elevation = distance X .65 or 2/3rd of distance or X 65 % of distance . I personally use a calculator , pinned to my task bar , to quickly calculate putting distances . Ex : 30 ft , 0 elevation = 30 X .65 = 19.5 , so hit 20 and never be short . Remember that 13 greens are a little more like glass , so , the ball will break faster requiring you to cut deeper into the break . A break is also an arc , so , the deeper the break the longer the putt actually is in distance . A 10 ft putt with a deep break may = 12 - 13 ft . Tip : I have aprox 20 icons / programs pinned to my task bar , ( located at bottom of screen ) that allow me to use them as incriments as they are located just below the swing meter . Hope this helps and congrats making legend ! CougarClaw