Update - I ended up not flashing. Kept using CC last night. I had one force quit when opening a book but I think it was a problem with the reader app and/or filename limitations rather than CC. Still no problems at all getting books from content server or through wireless connect.
I do want to thank you for including manual path entry for folders as my tablet id's the SD card differently and I can't navigate to it from the dir tree but manual path works fine. A couple of my other apps have no such option, annoyingly. And it moves them for me! That was awesome.
Now I need to go sort out my special characters issues.