I really like the way this is turning out and glad you are enjoying doing it. please take the time to audition the idea of using a sashing in this neat quilt. Some times on a scrappy quilt, adding sashings stops the flow and connectedness of the whole look. There is so much action and depth in this pattern, it might look better without the sashing.
If the sashing idea is to make the quilt larger, either make more blocks or add outer borders to increase the size, if that is what is needed.
I really, really like the quilt without sashing. Just think about it and audition that green before you commit to it.
keep posting your progress for all to enjoy.
peace