Years ago one of the major quilting magazines (sorry can't remember which) had an article on Bargello and said to sew all your stips together into a tube. Then cut. Then as you start to sew your strips together you simply take your seam ripper to the seam that needs to disconnect. Hope this makes sense. It saves you having to sew many different strip sets in a different order. You just sew the tubes and take apart the tube at the desired intersection after you have cut the second set of strips.