Some of you asked for a line drawing of the twisty top. Of course, this is a perfectly reasonable request but eh... It is my own design and although I can make tech drawings, I'm by no means an expert. In this case, I tried and failed to make anything which could serve to clarify the design.
So, instead, I took a picture of the pattern pieces.
On the left is the front piece, which is cut once out of a single layer of fabric (the line. which you can just see, is to indicate the grainline). On the right is the back piece, with a cut-on facing at the top. This is cut once, on the fold. I fused stretchy, light-weight knit interfacing to the back facing. With these two pieces, I cut a striaght band of fabric for the sleeves/collar which was 27 cm wide and 75 cm long, with the straight-of-grain running lengthwise (to make it not too stretchy).
I hope this clarifies it a bit. (I am also considering to make this pattern in S/M/L and put it on Burdastyle, to celebrate 400 followers to this blog. let me know what you think about that plan ;)