The hardest part of [Mike’s] little hack is the soldering. The pins on those iPod connectors are just evil to solder. You’ll need the patience of a saint. I’ve worked with these same ...

Unfortunately, the SSD upgrade and USB-C/Bluetooth mod aren't compatible ... like this that you'll be back inside the iPod at some point — like if a cable accidentally comes loose.

AirPods Max with USB-C will soon support wired playback thanks to a coming firmware update, and Apple now sells a new cable to help prepare.