I've installed the pre rooted kk version yesterday.But I think I'll go back to linaro cm11. LGs ok seems not fully allowing immersive mode. What I'd love to keep around would be the keyboard and the lock screen. I just love how the lock screen wallpaper reveals the home screen around the finger where the screen is touched. Other than that I think I liked cm11 better. I just have to pass on ART in favor of exposed. Xposed just brings so many options. Btw some Xposed modules just don't work as expected on stock.
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