I'm making a "Link" border with Boston Blocks. I was having terrible trouble with all the seams lying the same way. Somehow I figured out that if I press that first seam with one large triangle and two small triangles back onto itself, not facing away like it wants to go, my problem was solved almost completely.
The first strip I made, I twisted all the seams. There are just too many seams coming together at one spot to leave them like they were. After I pressed that well, it looked great from the front. And I don't care what a judge might think.