Great guide Hayden! but for those that missed to update to 15.00 - updating now is a bit tricky as in the code there is still a check that download servers must start with download, took me a while to figure why I was unable to update now..
Please consider adding sentinelfirewall/sentinel to the list. It’s a csf fork that we at OpenPanel are maintaining and invited DirectAdmin, cPanel and CyberPanel to use