Here is a picture of my block. When I first put the pieces side by side, I thought something was wrong. First of all, the armhole on the back looked too long. Also, the back seemed way to big for the front. But, when you pin the darts and put it together, it all matches. This means I DEFINITELY have a forward shoulder! I don't really see it myself when I look in the mirror, but the block doesn't lie. In fact, when I look at this block, I think I must be the sister of the hunchback of Notre Dame.
I wanted to make sure that everything fit. Here is the muslin: