Its really just trial and error until you find the sweet spot. Once you find something that appears stable, set up a bootable memory test like Memtest on a USB to check its 100% stable or you'll come across issues as you go.
No worries. What did you get to in the end frequency and timing wise?Seems to be running fine at the moment but yeah will run a test overnight to make sure. Thanks for your advice, really appreciate it!