I'm making some shirts for my sister. I made her a muslin from a chosen commercial pattern chosen for styling, and also had her try on one of my shirts from my self-drafted pattern. Mine fits her better overall and she prefers certain construction details on mine, BUT, though it fits her well overall, the sleeve and armhole are huge on her. I've done some searching for how to make the alteration for a smaller sleeve and armhole, but I'm getting two types of results, neither of which is what I need. I'm getting how to do a quick fix on a purchased t-shirt, or how to make armhole adjustments that don't affect the sleeve size. I need to correct both. I THINK I know what I need to do, but would prefer some confirmation before I continue. Since this is a self-drafted pattern, I don't have the option of simply cutting a smaller size sleeve/armscye on a multi-size pattern. I can't just use the sleeve from the purchased pattern because that one has a kimono-cut sleeve instead of a set-in sleeve.