DH is away on business so I had some time yesterday to get on with these blocks. My first problem was to trace the design onto the light blue fabric. I generally use the window as my light box, but it was dark by the time I realised I needed daylight! Well, they say necessity is the mother of invention, so how's this for an idea?
I balanced my 12.5" square ruler on my sewing machine and a handy box, put a desk lamp underneath, and the design (and fabric) on top! Worked like a charm. In case you're interested in what I used to mark the knot, it was tailor's chalk. It showed up beautifully on the blue, and was soft enough not to drag the fabric.
As to the assembling of the knot, I used a Clover tape maker with fusible web. This made it fairly easy to make the tape and position it on the fabric ready for sewing. Here's the next one ready to complete. If you see me soon, and hear me mumbling, 'Over, under, over, under,' you'll know why!