Going round the bend

I have been layering and quilting recently, so not much to photograph on that front, but I have made the next set of blocks for my challenge group. This block was the Corner to Corner Curve - a special invention of Lynne Edwards', which uses a corner to corner line which is also a quarter circle. (It's a Drunkard's Path which fills most of the square instead of being restricted to one corner of the square - a kind of Alcoholics' Anonymous Path!)

Since my pieces were smaller than the original (and I had to draft them myself) you'll notice that there isn't a lot of meeting in the middle going on here!

I'm not sure that the rest of the blocks are much better, but they'll do fine. Can you spot my undeliberate mistake? Why does that always happen!