Can't enable coolbits in xorg.conf for more 1 card. Overwrites on reboot and chattr hack leads to graphical errors :/

This week my 1070s were OC and followed https://www.phoronix.com/scan.php?page=news_item&px=MTY1OTM for one card with success.
Next I fit 2nd card, reboot and notice previous conf was modified and when I followed https://www.gpugrid.net/forum_thread.php?id=2925, xorg.conf is overwritten, so I tried the chattr hack and this then just spit out graphical error on login (tty's work fine but need access to nvidia-settings GUI)?

create your own xorg.conf file as per this guide and you will be good to go....