UPDATED!
I just updated the 5.50-GEN-D3 Firmware Packs, fixed the few minor issues we had:
- more recent D3 version
- flashing from pre-3.52-M33-4 (like 3.40OE, for example) now no longer breaks VSH menu and recovery menu
If there's anything more, just post it here
The original download link is still valid, same URL, only gives the updated archive now, so no need to update any links that have been posted somewhere.