Hi all! I am going through the Lacroix patterns and translating them to hopefully add to my drafting techniques. I am getting stuck on the point d'aplomb. I'm understanding that it's a 'plumbed point' and looking at the pattern I think it may be some corm of balance point to give a straight vertical line from underarm seam. Can anyone confirm this? It appears to be the half half waist minus 4cm. Thanks