How to get to 47A from new phone?

My LG G3 seems to have died tonight.
See here: http://ift.tt/1LVTGVC

I really do like this phone so I ordered a cheap refurb replacement off ebay.

What's the process to go to from whatever it shipped with to xdabbeb's 47A version found here w/TWRP?
http://ift.tt/1LVTGVE

from xda-developers http://ift.tt/1ZHHn1i
via IFTTT