Default G3 Korean

Does anyone know if there are developers handling the F400 series, It's been a long time without any changes and the SPHYNX developer seems to have vanished completely,
I rooted my phone and i am not getting any updates whatsover, Do i unroot it and flash with the only very old version so i can get updated to the latest (i believe the f400 are on 10J and i am on 10Gg
Does anyone know where i can get the F400 10J so i can flash it? Is there a repository of lg g3 roms the way samsung use to have it
Please answer if i unroot the phone flash the older version i will get the OTA update or because i rooted that is not possible any more
thanks guy, this old geek appreciates it