I have the Multi-forth manual and floppies...
I started using Multi-forth in 1887, used it all the '90s and i yet consider it a very effective forth implementation. i bought the two versions, as the 1.1 was substituted one year after by the 1.23, and the 360 pages of the illustrated manual was a strong point in it's favor.
I still run it in the Amiga emulators thanks to the Amiga Forever roms, to check and transfer my code and typical Multi-forth routines to other forth flavors on today machines and environments.
Some code is still quite useful...
Happy to contact Multi-forth programmers from those days !!!