Rk3188+android+51+firmware+better !exclusive! Link

Icons and UI elements scale better without consuming excess storage or memory.

Hi everyone, I am currently running an older version of Android on my RK3188 device (MK808/B004/etc.) and the performance is lagging. I am looking for a "better" firmware upgrade specifically for Android 5.1. Does anyone have a link to a stable custom ROM or a patched stock firmware that improves speed and reduces stuttering? I've heard that Lollipop runs much smoother on these chips, but I can't find a working download link. Any help would be appreciated! rk3188+android+51+firmware+better