Eleanor Burn's Flying Geese templates are at first confusing, but my favorite way because the FG unit is cut LAST! First you make the pattern that yields 4 FG units (only four lines of stitching corner to corner). Then you press well without stretching. Then you cut the FG to the size required. I use quilter's edge strips to make a jig for doing the final cuts. It speeds up the process. I can make 16 FG units in about 20 minutes, and they're all perfect. AND I am NOT a good piecer!