Golden Master of Mojave was 10.14.0 release, last September…Hi Alex
Yes, I initially installed Mojave to a spare APFS SSD .. then used CCC to clone that install to an hfs+ 960 EVO M.2.
I'm keeping the APFS SSD Mojave 10.14.3 install intact until Mojave goes GM.
Then I will CCC clone it again to the 960 EVO M.2