Bill, I have two Sols with the 80/64 video upgrade, and I have
 docs (I think they are online already -- it is all such a blur
 what I've done or just thought about doing). 
Been there!
  Anyway, when you get around to trying the 80/64
update, let me
 know. 
Sure!  Always good to have help.
  I have no docs on the Z80 upgrade, though. 
I'm hoping it just drops into the 8080 socket.  The picture kind of
looks that way.
By the way, are those two 50 pin connectors off the side of the Sage
for 8 inch floppy drives?
Bill