FWIW every putter, here on WGT, has its own set of quirks. Some putters like the "ding" (heavy White line) - some don't. The more that you pay for a putter (surprise) the more accurate it gets.
Please see Forum threads about the meaning of "Precision", "Forgiveness" and "Balance"- found in the SEARCH box to the right.
Eg: my L77 Nike does not like the "ding" for putts over 5 feet (the ball will drift to the left on a "ding") The Forum says that putters with higher "Balance" numbers like the "ding" better.
If you are having trouble with gauging how much power to use, again the Forums can help.
If you know how much power you want to use, but are having trouble figuring out where that 'spot' is on the bar - look at "Putter Pal" from WGT (or be cheap like me, & make one yourself).
Good luck - remember this is a journey - supposedly for recreation - and no one except WGT make a living here!