Really nice use of simple wave forms! I love the way you make them breathe. You control the stacking of overtones really well. This is the sort of thing you listen to with headphones and let it massage the inside of your brain. I could have used a little more detail in the background. There's a lot going on up front with harmonies and melodies blending together like chalk being smudged, but with this sort of ambient stuff I feel like microscopic textural work in the background helps give the track more dimension. A mentor once mentioned that a drone is never just a drone. On a macro scale it may move slowly or even be stagnant, but on a microscopic level it's always moving, undulating, and creating a sense of motion. I don't have any specific suggestions as there are many ways to approach this, but I've always found it helpful to keep in mind when I work on ambient tracks. That said, it really does feel like coming home. You've managed to tell a story with this one excerpt, and I look forward to hearing the rest of the album!