A bit nicer than the one I did for a ZX80 many years ago. I simply stripped the membrane key layer off the PCB, and soldered a set of mechanical key caps in pl

A bit nicer than the one I did for a ZX80 many years ago. I simply stripped the membrane key layer off the PCB, and soldered a set of mechanical key caps in place. It worked, and was a lot nicer to use. The key caps were clear (and removable), so I placed pieces of paper with the various symbols under them.