Also after reading this thread, i have to say alot of what it seems you did was unnecessary. The 866 fxz update only requires you to swap out the boot and recovery images with the .893 boot and recovery, along with editing out the cdt flash completely on the xml. And with the 893 fxz the only thing that is needed is to edit the cdt flash and formatting of the internal sdcard. Nothing else will prevent you from taking the 901 or 902 update. Hell, you can just use the edited xml from the 866 fxz and put it in the 893 fxz and that would work also. All of which these fixes have been done over a month ago. The cdt.fix was made by realbbb.
Why is the internal sdcard format needed???? seems like a wasteful step??... also the FixCDT script is merely the the .901 cdt.bn file, with accompanying dll files to ensure the users PC has the necessary files to run the scripts, and the simple script to run the flash.... I don't know what realbbb put together but it's not this one...