butterflywing........I did them the way Eleanor Burns did them in her "Egg Money Book" .....which is I used lite weight fusable webbing and a template.....cut out the template and sewed it on to the arch then turned it right side true.......and found my center of the arch and the rectangle....ironed it in place.....then I did a blind hem stitch on both side.....and then added the half square block to the corners.....make sense??.....:-)