I'm betting root thread grafts.....
Looking good, Brian. Let me know if you have more cuttings or layers you want to get rid of.
I have two in the ground: one is an air layer from it that I'm getting pretty excited about (photos attached are from last year). The nebari is 10x better than the parent, and I thread-grafted all new branches through it a few years ago, so they're mostly in all the right places. It's smaller, but nicer.
I also have a cutting growing with good movement, but it's only pencil-thick at the moment, and needs root work next spring, then a few years in the ground.
Georgiabonsai got the third one.