i didn't want to make a new thread, but does the same apply to updating from VC to VD using LG tool and flashing TR after?
Hi! Yes, you follow the same procedure going from VC to VD. Remember though that when you update through the LG Updater tool to follow the prompts carefully and do not disconnect your phone until the program tells you it is completed. Also, make sure you have a custom recovery and do a NAND backup first, and have TR 1.8 at the root of your sd card so you can unzip it through your custom recovery. Once the updater tool is finished, your phone will restart. Power it back off, then press the volume down, home, and power buttons very hard at the same time for several seconds until your custom recovery comes up, then flash TR 1.8. Once you flash, restart your phone and then you will have root and TR 1.8. Hope that helps!
EDIT: The above is true if you already are rooted and did not update to VC OTA. If your phone came with VC already on it or you got VC OTA then you will need to follow the instructions in the revert threads.