I happy to report that I've completed some major refinements to the vest design. Those evening classes in pattern-making at FIT appear to have paid off. Principal among the changes were the integrated vent holes, a collar, and better overall fitment. I created an entirely new cell network which perfectly conforms to different body types on inflation. Also, splitting the cells at the waist area improved the seal considerably.
I have some ideas about the outside printing for the "generic" version of the vest, and I'll share those in an upcoming post.