I agreed with MrBest, there is a pretty reliable math formula to use with greenspeed and slope adjustment needed, it's an individual thing with several individuals using the same 5 or 6 different means to an end. I am comfortable with a baseline amount or starting number then i add in the conditions. As a baseline number i have a good idea where 1in equals 1 ft in elevation and i eyeball the break rarely moving the pointer which probably woud drive some players nuts,i very rarely move the pointer at all,,mostly on drives andi try to hit center of meter,other than that i hit before or after the center of meter on putts as well. so i guess we're splitting hairs trying to come up with a universal formula,,to many variables involved. ACA