My shirt fits are like 98% perfect but I still occasionally have tightness across the top of my back. If I'm sitting at a computer chair leaned over the keyboard or sitting on a bar stool leaned over the bar for example. Nothing too bad, more annoying than anything (not really restrictive).
Has anyone had a similar issue and fixed it or is this a standard "problem" with dress shirts? I've increased the yoke some which helps but I really don't want to have a bunch of extra fabric back there just to fix this minor issue.
Have you considered adding a box pleat?