Article and discussion might be of interest:
This looks like an interesting module but its being based on a microcontroller board that seems to be so problematic to obtain in its correct form puts me off. If for example someone got a 128k board from the AliExpress link posted above, great, but it says 64k in their listing and if you were to order one and receive a 64k board you’d have no recourse. Not a mess I want to immerse myself in. If this project were built around a Teensy it’d be a very different story; you know where to get genuine Teensies with known specifications.