I am putting a 1" binding on a wall hanging and can't seem to get the corners mitered. I've viewed half a dozen tutorials, but they all seem to be for a 1/4-1/2" binding, and that technique doesn't work for the wider binding. I cut 4 1/2" strips, folded them lengthwise, sewed them to the top edges of the quilt top in a 1/4" seam, folded it over the edge, but can't seem to get the miter right. Any help would be greatly appreciated.