I forgot to mention that you are also starting to allow certain notes to “sing”, to stand out, through either volume or displacement, which gives the music a vital, “three dimensional” quality. This was pointed out to me regarding my own recordings by a fellow improviser. Uniformity and smoothness, while traditionally fine ideals for purely physical execution and technical practice, can be destructive to idea generation and rhythmic life in free improvisation. Moreover, which features should stand out doesn’t seem to be amenable to conscious decision in improvisation in the same way as it is with playing a piece. It just seems to happen, which is a puzzle, at least for me.