Thanks, Jokir, I'm actually quilting geese, using a ruler, but that's a good idea.
Thanks everyone for the great ideas. I'm going to take a break and go back to it after a bit.
I've been staring at it (Thanks, Bearisgray) and I think it will be easier if I start from the other end of the line.
I'm doing it on my DSM and I watched a video on the ruler before I bought it but they were using a long arm. It sure looks a lot easier, with the long arm! (If, of course, you know how to use a long arm.)
Watson