a little footnote. I found a video on CONEX website showing how it works. It appears that you need to also purchase a screw removal tool ($11.39). The reason no numbers show is that there is a separate sleeve adapter/ferrule you also need. I have sent them an email for clarification. Still, excellent product for club makers
From the video, it looks like they're exceeding the optimal capture speed? It also looks like they have perfected less than optimal looking strokes, although putting is a very individual thing.
Haven't looked it up but I'm willing to bet there is an organization that holds putting tournaments on real greens? Not that there's anything wrong with miniature golf greens.