Wow, 2 points, different rock, same shape, identical weights! Nothing wrong with your ability to reproduce a point, that's for sure. Very nice.
Hmm, watching the videos was interesting. A couple things jump out at me right away. First, your point is half the thickness and quite a bit wider than mine typically are. Second, I'm pushing much harder on the point than you. Perhaps those 2 are related? I did try to use the notching tool to abrade and alter the platform on one point and the notch stalled right there instantly. I'll have to work on that. I've been depending on the previous flake to have moved the edge below centerline. When it doesn't the notch stalls. I think I'll make a second notching tool of a more rectangular shape. I'm not sure the shape of mine is optimum. I'll take some debitage and do some practice notching again.
I have a set of diamond needle files on order, couldn't find any locally.
Thanks again John,
George