It may go without mentioning but this is design as a single non-repeating design with a lengthwise mirroring or symmetry, design for a triangle start (hence the simple empty chevron at the start and end, which can be omitted. This was certainly the most difficult to create of any of the large patterns that I have made. I got hopelessly lost many times trying to achieve the vertical symmetry and it took about 6 hours total. I am pretty set on making it. It will be hard, lots of dots which are never easy.