Second posting. I've made some changes to the design. Things to note: - VIO is selectable between 3.3V and 5V with a slider switch - A through-hole stackable header is used - silkscreen is cleaner
I think that covers all the outstanding comments. Attached are the schematic, design files, and a rendering.
Comments welcome. I hope to send this for a pre-production run next week.
[image: Inline image 1]