The doublet will get second, smaller sleeves. The edge's jagged and took much work :-) When drawing the lines I found out that 50 cm on my measuring tape are not the same as 50 cm on my ruler!
The velvet has to be pinned very attentively. It moves when you sew it and it's flexible. You can see on the picture that I am not exact, I still don't have enough experience. However, in the final effect it shouldn't be visible..