I did try, but on my current lousy internet connection (0.2mbps) their site is a nightmare to use. I finally managed to get a video to load, stuttered through 6 minutes of it, only to find that the fabric they'd used was so busy you couldn't actually see the cut lines in the piece they pulled out.
I think I did pick up that a triangle die will give you two triangles forming a square, so won't waste fabric that way.