Manually dirty flashed over 05Q along with SuperSu 2.46. Worked flawlessly. Icon and status bar designs are a lot cooler than the nightlies and unofficial CM12 roms. :D
Tibu everything then let google play install everything on v30. Restore only app data from v29 after everythings installed.
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No, you dont need a rom for either. As long as youre rooted with SuperSU installed, you can do both. After installing Safestrap's recovery, boot to recovery and make a backup in your external sd.
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Install safestrap 3.72 and uninstall recovery, then reinstall it.
Afterwards boot into safestrap and wip everything except your external sd. After that flash the ss certified rom of your choice then flash the att nb1 modules zip. Boot up and you...
Just wanted to chime in and say that the bottom modem in AustinVillan 's link fixed my signal issues for unofficial cm12.1 :)