This is the complete LG KK 20D ROM - nothing missing or messed with.
If you follow the method below exactly, no Audio glitches, no Touchscreen problems.
You can flash SuperSU and get root if you wish - your choice.
I provide this assuming you have an understanding of the terminology used below and appreciate that any flashing activity has some risk.
I strongly advise against using any form of restore from previous backups, such as TB or Nandroid.
Once the process is complete, custom recovery will be lost.
Download both the ROM zip file linked below and SuperSU zip file (if you want root) and copy to your SD card.
You need to be already on Rooted JB or PURE CM11 with either TWRP 126.96.36.199 or 188.8.131.52 or TWRP 184.108.40.206 (nothing else).
Reboot to TWRP recovery
Wipe: System, Data, Cache. Dalvik (nothing else)
Flash the ROM zip - ignore any "FAIL" warnings.
Wipe Cache and Dalvik (nothing else)
Go to the Mount page in TWRP and select System (leave the other defaults alone)
Flash the SuperSU zip - ignore any "FAIL" warnings
Don't use AutoRec to flash TWRP - you will lose Knock code.
Alternatively - if you have flashed TWRP on another KK Stock ROM (using AutoRec), you can full wipe (not SDCard) and flash this directly without going back to JB.
Download from here: