Can I ask if you are working with any established US defense-oriented electronics firms that go further up the supply chain in auditing/documenting sources and chain of custody of components and the whole BOM? Having US made circuit boards is great but if a certain model of microcontroller only comes from one or two sources and they're in mainland CN, that's a known caveat that has to be documented somewhere... Or if the same product is available at a higher price from a different location. That sort of thing.

One example I could offer is APD, the ESC manufacturer in Australia. They sell ESCs used both in the commercial cinema/filming industry (big quads and coaxial octos carrying RED Komodo size cameras), but also for defense...

Haven't yet worked with them, but that is one of our goals. We produce documentation to trace all components up the supply chain. In cases where the part is truly only available in CN, we clearly state this.