Yes, I actually had to start from scratch because I needed to do a DFU recovery after my first failed attempt. I reinstalled because I couldn't (& still can't) get Magisk working (Basic Integrity + CTSProfile) and now have DrakenFX bootstack functioning with the ROM. I used "A2017UV2.1.0B20v01_Bootstack_by_DrakenFX.zip" and it worked swimmingly!
As for Magisk, I believe it can be fixed by reinstalling a stock ROM and then doing a clean installation to HavocOS, but I don't have a good understanding of how everything functions. I also can't get the NFC functional. It was functional on ArrowOS which I had installed previously and it eliminated the occasional "System UI not responding" stutter/freezing.
But other than the NFC/Magisk issues, everything is running flawlessly! And I like how many options Havoc gives to the user

Let me know if you have any other questions or want me to check anything.