The idea for having the command rig as a Proto-fictional MCU is a pretty good idea, instead of saying command unit 1 it could instead say mass casualty unit 1, that is your own call though im just throwing a suggestion out there. The rig itself is really interesting and it would be nice to see it included in some sort of usage even if it is fictional.
On another note, if anyone who's been here for awhile remember the Sepulveda flood picture with the blazer and ward I may have found out what station that rig belonged to during the flood. the picture shows engine 288 rescuing a civilian during the flood, the post itself mentions that engine 88 was stranded on the Burbank overpass by rapidly rising water and the crew had to be evacuated by helicopter.