DynaWoods25567:say im 15ft away, full putter swing being 30ft, and its downhill, if i hit half power, sometimes it may go way past cos its downhill, other times it will virtually ground to a halt about halfway to the holde, so it leaves me totally guessing now.
First, change your thinking, as Gary said.
Second, take care of the green speed. It changes often with tier changes. In multiplayer games, the speed follows the highest tier - potentially quicker than your "fast" speed.
You may also want to use a bigger scale just because lower amplitude means slower meter.
Have fun!