Too late now, but those keyboards were actually standard Keytronics
ones, and not at all hard to repair.
-tony
I'm fairly certain that the MG-1 I have is one of the Stern Hall machines
mentioned earlier.
But in re "standard Key Tronic"... The one here is certainly a
foam-and-foil capacitive device like a Key Tronic keyboard is, and surely
the mechanism is basically identical (as are its repair methods). It still
works --- for now. But the pads aren't little round tablets like the usual
KT fare but instead squares with one of the corners notched out (think: the
shape of Utah, but squarer). I do not look forward to those pads degrading
further and expect it may be necessary to get some kind of custom die punch
fabricated in order to produce replacements.
I can't easily retrieve the name of the keyboard manufacturer at the
moment, but I wonder if anyone knows more about this odd shape of
capacitive pad.
--T