It would be fantastic if you could find the time to tweak csf/lfd to be cPanel DNS ONLY compatible?
I'd be more than happy to set up a cPanel DNS ONLY VPS for you to test on. It mostly seems to work, but throws a few errors on restarting, like "Couldn't load target `acctboth'", "Could not create /etc/cron.d/csf_update" and "exec of /usr/local/bandmin/bandminstart failed" - seemingly not too significant to overcome?