I've just discovered Antediluvian Designs 

at http://planemo.org/retro/z80pack-cpm-emulator-nz-com/

has a link to my MYZ80/NZCOM tutorial in its old location:

/cpmarchives/cpm/Miscellany/ZCPRZSys/Build a Z-System - NZCOM, MyZ80, BGii, ZSDOS/

But I had relocated it to 

/cpmarchives/cpm/Software/Humongous/ZCPRZSys/Build a Z-System - NZCOM, MyZ80, BGii, ZSDOS/

thereby breaking the link. I'm copying it back. I should simply make a redirect to the new location, but I'm busy at the moment. Do that some day.