So, I find fabric and sew, also I velcro. A vestigial memory of the various uses of bias binding inspires me, so the back straps are a wrap! Theo sews on the final detail, that telling button. One of my very first friends was, in part, cartoon, so now this looks just right.
I am not sure if I've over spent on time on this, but right now, I am more inclined to consider it might be an investment.