I configured MultiBeast and applied the settings to my Mojave partition after the Mojave install (see pic). But, when I choose the Mojave drive as the drive to boot from, the progress bar barely moves and relaunches in a loop from the Mojave partition, getting me nowhere.
All good now
I think what happened was the USB thumbdrive got ejected when the USB drivers were getting installed and that messed something up.
I ended up re-installing Mojave, then when I configured MultiBeast I removed the USB drivers, applied to my HD, and everything works so far...built in HDMI, USB 2 & 3, Ethernet. Haven't tested audio, but I use external hardware anyway.