First off thanks goes to cbucz24 for extracting the TOT into IMGs. Also, thanks to meraz9000 for making that possible.
Ok, first off there is one draw back. You MUST have access to TWRP, or the ability to install TWRP. First you want to download the system, boot, and recovery images. I pulled them from the IMG zip mentioned above and zipped just those three. You can download it here.
Secondly, unzip those onto SD card, or internal storage if you don't have one.
Boot into TWRP. Easiest way is to use ADB "reboot recovery". If you can't do that, hold volume down and power button, and when you see the LG logo, release the power button for about a second, then continue pressing it. Say yes to both prompts and you'll get into TWRP.
Next BACK UP /SYSTEM! This is very important. Whenever you make a change to anything, make a system backup. DO NOT SKIP THIS.
Next, go to Install and in the lower right tap images. Find system.img and choose that, and choose system image. Install boot.img onto boot. Now reboot to system. If it boots properly, go back to recovery and flash recovery.img to recovery. When those are done, reboot to bootloader, and relock the bootloader (for SafetyNet).
If you have any questions, just ask.
Please use LGUP and the KDZ file to restore from now on. It is a much reliable way.