I managed to implement mrjcd's instructions that OP mentioned above on one of my two EA8500 routers, but I replaced the stock firmware with DD-WRT (as did mrjcd), and implementing those superb instructions was a pain; I did this before I discovered LEDE.
I'm guessing the same procedure would work with the LEDE firmware instead of the DD-WRT firmware, but have not tried this yet.
Hope this helps.