Nope, because there's never a chat option, email support no longer exists, first line don't seem to be able to raise server tickets and I don't want to spend piles of cash on the support phone line.

 

This should be a standard option in any CentOS build, given that it's a default "on". I can't seem to find any detail of exactly what it tweaks anywhere online, either, or I'd do it by hand.