there is a method by which you cut strips, lay them face to face, sew 1/4" from each edge, and rotary cut using the point of the triangle. can anyone picture this? i don't remember who does this method, but there is a video. try kaye woods. of course she's selling her template, but it would work with any method. you go down the whole strip, just reversing the point of the triangle. the stitches are already there.
of course, you can change the degree of the triangle and the strip size. the great thing is the stitching is already done for you.