I can't believe this topic has not attracted more interest and replies.
I am small, slim and have a hollow back.
I am also not overly fond of the looks of darts.
Over the course of the years I have had MTM shirts from various local businesses, I have ordered shirts online based on measurements I took from existing shirts and which I adjusted several times.
Nothing has solved the problem of massiv billowing around the waist and honestly the balance of some of the shirts...