Braiding with the cubes is difficult to start but once I had it going it was easier.
This sample use 15 cubes on each of four threads and 15 seed beads on each of the remaining four threads.
I ended by braiding again with just the thread and an overhand knot.
Going forward with my design I think that I will try using larger seed beads and do a section of braiding with just the seed beads before braiding with the cubes.
More design testing to come.