Two years ago! I worked on this project; http://stone-belle.blogspot.com/2011/10/zigzag-friday_28.html
So one night 2 weeks ago I couldn't sleep I pulled it out. It looked like this when I quit working on it;
I added a little helper to my ruler; you can barely see it in the picture of the ruler. There is a sheet of non-slip stuff that I purchased at Jo-Anne's.I trimmed it to triangles and put it on either side of the diagonal line on the ruler. Here's another picture, but it is hard to see since the stuff is clear;
So now I'm sewing them together....It works best to sew one on at a time so I don't flip the seams. There is not much room in an inch for a seam to 'flip'. So I'm trying to do it so I don't have any. And yes, I've had to rip out a few to get them to lay flat.
Now I'm not finished but you will see it soon.