Originally Posted by Ed999
Please could you post a link to this fellowship, as I would like to explore the procedure for downgrading back to 4.0.0.
The "simple debricking" sticky thread in the dev corner forum. The first post in that thread contains a "forensic images" link to a pastebin page with URLs for the 4.0.0 images that you seek.
It has been summarized by silver18
into a "small debricking guide for noobs" PDF file that you can download from the Tools index wiki, if you follow the links from the "master index" sticky thread in the dev corner forum.