Didn't bother with Carbon Copy Cloner since I just CCC copied my High Sierra Thursday, and figure, if it munged, I'd start back from there. I was already at Clover 4920 since I just updated from High Sierra to Mojave on Thursday, Friday, Saturday and Sunday, spending most my time dancing around being one of those who VGTab didn't work for.
Put the new port limits in my config.plist
Ran the update, I think it was three reboots.
Success! Checked USB and both my drives show up fine.
Next up the dreaded fan test.
Not as high as my undervolt score in Windows but I'll take it!! Especially since the fans ramped down after it finished!
Glad to be on Mojave now!