Thought about this when I got up. You said OBW and I just automatically thought about the settings I have used. Never put the S&W into a OBW. But if that is the way you are going, then the last one would probably could have large black spaces if you didn't position the wedges to compensate. My eyes seem to prefer resting places and so I have used star settings, DP settings, etc., all using S&W method but not the OBW method. #3 would make a pretty transitioning colored quilt, I think, for an OBW. Good luck.