I assembled those things immediately after receiving them.
The busboard is working perfectly. I’ll share my edit of the original PCB upon request, it’s a very trivial edit and uses a nightly version of kicad and i don’t like polluting the commons too much with trivial edits. Plus it’d be a bit of effort to clean up and document haha.
The 3340 breakout board was easy to assemble (even assembled it before being told that build instructions existed, since no link to those was on github, haha).
I got sound output! I don’t know much yet about using a 3340, so this little board is gonna make my explorations much easier. I have three chips, and will definitely put together a pair more boards soon. One will be turned into a VCO module for sure.
Also this little raft full of trimmers was a great gift to myself I gave myself a few months ago.