It's alive... IT'S ALIVE!
After installing those 3 debs and correcting a smaller error I had made in /etc/fstab, it's now running flawlessly. Thanks for all the help and tips. I'll be sure to save this page as a reference for future builds, as I have no intention of doing this once. However, the building process will be a wee bit different now that SinoVoip have finally made steps towards upgrading the ancient-as-f*ck u-boot?
Anyway, thanks again!
PS: Yes, the M3 is in dire need of a heatsink.