Well newest version of TWRP 2.8.3 did not work for me. Install failed halfway thru and just went back to recovery screen. Unfortunately my fat fingers made a mistake in attempting to downgrade TWRP to 2.6 that left me in a semi bricked state. I was able to restore easily using the LG Support tool, however that took me straight to 20d. Root was simply enough but getting working recovery again was a total pain. Wasted a few hours trying to get back up an running. I was finally to get this ROM flashed but had to convert over to Philz Touch recovery to do so. Thus in order to save folks a bunch of grief, I would highly recommend posting in top of thread to only flash via recommended version of TWRP or using Philz Touch Recovery. Latest version of Philz worked without issue. Not sure why TWRP is not working in latest versions. Anyway, again those interest in this Rom I recommend first flashing Philz Touch Recovery. Version 6.88.4 of Philz worked without issue.
I use the older Version of Twrp 18.104.22.168,this works without issues for me.
All newer Versions did not work for me.