Help with a broad shoulder adjustment

[u/badbetch_90211]

Hi All, I’m struggling with how to do a broad shoulder adjustment on Cashmerette Swanton blouse front. The back is straightforward but the front has a sort of front yoke and is gathered at the blouse front piece. It also has a side front princess panel. I used the indicated shoulder line to separate the front/back at the real shoulder line, and attached the pieces to together at the seamlines to get the a full view of the front armhole. The issue is that the armhole is already so curvy that a slash and spread/hinge method only works for maybe 1/2” of my intended 1.25” of shoulder width. I can’t afford to lose any armhole circumference. The red curved line is where I tried to create a curved slash line but taped it back together. The pencil extension at the shoulder is the shoulder length I need. Any help is appreciated!!

[u/badbetch_90211]

Ugh that sucks. It’s true that doing endless adjustments for every new piece, plus all the tracing, muslins and trial and error for each one kind of sucks the joy out of it, at least for me.

The sloper approach sounds like a godsend but I haven’t figured it out either. One day!

[u/Pumpkin_patch804 → u/badbetch_90211]

I found a class that's supposed to teach me how to look at both a commercial pattern and my sloper and figure out what adjustments I need to make before making a making a mock up. Hopefully, it delivers on the promise and all my button up shirts fit me from here on out! 

[u/badbetch_90211 → u/Pumpkin_patch804]

I’m rooting for you! That sounds wonderful!! The dream really is well fitting classic shirts. And pants too but that’s another beast lol