I've been putting my sashing on a little different. I put sashing on the right then on the bottom of each block except for the far left blocks. Those I only put it on the bottom. Also the bottom blocks I only put it on the right side. The last block on the far right of the bottom gets no sashing. I then sew all these blocks together & finish it off with borders just like the sashing. If I want other borders I can then add 'em. Clear as mud?