I too have to put a pin on the side to be sewn!I have made too many pinwheel blocks going the wrong way-ends up a 4 patch instead-so I had to do something to show the right way.(still made a few 4 patches that weren't found in time lol) I do the strip piecing way when doing 9 patches much easier and faster. And like everyone else I give it a rest until brain works again.