Stacks 4
I decided on another octagon for the alternate block, but with just four stacks in it. I was playing around with how to set these and I would be happy with either way shown on the left, but I'll probably use the design from the top left. I laid out some more in that design, where you need to match the stacks around the original octagon, so the alternate octagon can't be sewn together until you get all four sections placed. I haven't decided on the corners for the octagons yet......
Stacks 4
I decided on another octagon for the alternate block, but with just four stacks in it. I was playing around with how to set these and I would be happy with either way shown on the left, but I'll probably use the design from the top left. I laid out some more in that design, where you need to match the stacks around the original octagon, so the alternate octagon can't be sewn together until you get all four sections placed. I haven't decided on the corners for the octagons yet......