I'm glad you mentioned that, because that reminds me that is how I was hitting those much better impact positions originally earlier this week. I'll combine the feel I'm using for the hand path with the slow start and speeding up of hands on the way down.
The best tool to use when you're reading greens is your feet. Walk the putt off and feel what the green is doing under you feet. We have a great a ability to detect when we're walking up or downhill or on an incline. Sometimes this is more reliable than using your eyes.
If you need me to elaborate let me know, but…
The hand path looks better.
You have to do the hand path and the speed boat feel (which also means you can start down slower and keep speeding up, rather than slowing down prematurely).
There's only so much you can do with where the shaft and sweet spot are going. As I've mentioned before.