So Houstonn has been working on a port for you who want to use the Stock LG 4.1.2 . And i'm making the thread for him.
I'm using the disclaimer.std > Everything you does is at your own will, and by doing so, if you break your phone, no one else than you can be hold responsible for the damage. We might try to help you however, don't blame us if you are alone.
Houstonn -> Of course, it's him that you should thanks not me.
Install it via cwm (twrp won't work)
The second post will be for houstonn to post you update and workaroud if any.