So i've been trying to get Any AOSP roms (CM12 preferred) Working on the D803 with no success at all, I actually had to KDZ back to stock after completely fudging the system partition. Any good guides?
I have the D803 as well. Have you tried AICP (http://www.aicp-rom.com) I've been using it for a month and have had a few minor annoyances but for the most part it is really good. It is CM12 based with a few extras. Quite stable, good community and active moderators/owners on G+. Builds every second day and best of all: it supports the d803 without you needing to tweak any scripts or kernels. http://dwnld.aicp-rom.com/?device=d803