Installation of Custom ROMs from spegelius
Spegelius has three custom roms for your shiny S4A unit.
Slim_AIO_gapps.4.3.build.2.zip - slimrom.net
gapps-jb-20130813-signed.zip - goo.im/gapps
Slim + either gapps -> Google Drive will crash. Other than that the usual known bugs.
AOSP + generic gapps -> Google drive working good. Minus some of the advanced tweaks you see from CM
CM Rom + generic gapps -> Google drive working good
Note: Switching CPU governor to msm-dvcs will crash the device on all three roms.