I'm self taught in many things, and that is always the way it goes. Worse than plateaus are regressions, where you actually feel like you are going backwards!
The name Hummingbird Point comes from my early habit of taking hand sized spalls and reducing them down to one ore more finished pieces that were too small to even be called "bird points". Looks like you have the makings of 3 "hummingbird points" there, so well done on that, but I ain't giving up the name!