I've refined the process a bit. I discovered that Cabo #6 is available in practice mode as BO3 #3, and its tabeltop-flat green is ideal as a test bed. I've also found that it's possible to set up putts that are within one ball width of each other at the starting point by using background objects and the putting grid as reference points. Finally, I bought a Putter Pal in order to get my power as exact as possible. I used the L77 Nike again. Only dinged putts were saved.
L77 Nike
In the pic, you can see that I'm starting from 21 feet behind the hole and 2 feet to the right. My target is straight down the vertical grid line. I used 15 feet of power (75% of the 20-foot scale) because it will be easy to mark on 20, 25, and 30-foot meters.
This grouping is a bit tighter L-R than the Bethpage #10 test. It could be due to the flatter surface, more consistent power inputs, or just plain luck. (note there are only 19 balls in this test because I can't count).
I will re-test the starter and Daytona putters soon. But first, I wanted to find out if I need to be concerned about wind.
Wind will definitely be a factor.
There are only 10 putts in this sample. I had a full 20 done and was in the process of overlaying the grid when my ancient Paint Shop Pro program crashed. I recovered this from my last save point. The last 10 putts weren't remarkably different, so I didn't bother to do them again. As you can see, the wind slowed the top group a tad and pushed the bottom group a little to the right. So that's something I'll try to control for in the future.
I plan on adding more putters to the mix. I will test forgiveness on small and moderate off-dings on this hole. I will also find other holes to try downhill putts with moderate break and big-breaking sidehill putts to see if I can tease out what this "balance" thing is all about.
I have tried to find a suitable hole to test irons. The problem is the camera angles. I need to have every shot finish with the same camera in order for it to work with this process. Also, replays are useless because whenever I use one, my mulligan feature stops working for the rest of the game.