I think it's great. I would add more of the background all the way around and get it fully "set" into a block. Do you plan on washing it? If you do, Perhaps you could top stitch right through it with a clear thread... There's no way I would back all of that out and redo it. I think I would use it the way it is and make some more until I perfect it. Definitely using the ruler. Your fabrics are beautiful.