Alongside the making of this green duponi silk cincher I wrote an article about how to up your corsetry game (posted yesterday for all Patreon tiers). I suppose it is kind of a trouble-shooting guide, in it I talk about design, fit and construction - the key aspects in corsetry that need to be mastered if you want to become a professional. I have also listed the article in my Etsy shop for a nominal fee.
The pattern comes in 108 size variations and in a conical and hour-gass rib shaping, and can be bought here through my website or in my Etsy shop (the corset sample is also for sale!).