Keyboard (ENTER) fix for vintage 12c?

[Bruce Larrabee]

There is a rubber sheet under the keys. Under the rubber sheet there is like 8 sets of steel domes five domes per set, configured in two columns and four rows. Under the domes are the usual gold plated traces.

You can basically see the whole thing here:

http://gallery.brouhaha.com/v/computer/r...6.jpg.html