OOOOps!!! just got home from a rugby game and my computer was still on and it looked like the post never went through. Thank God it did! What I did notice was that I referred to the hourglasses as "halfsquare triangles" ....ooops no they are quarter-square triangles. So sorry! H-10 has two actual halfsquare triangles in the center and 4 quarter-square triangles in the outer border; H-8 has four quarter-square triangles at the corners
Gus
very cool adnil!