OldSynths

My local analogue tech, who owns a CS80 himself, says that the 
aftertouch sensors on the CS80 will deteriorate over time and need 
replacement. He thinks that Yamaha threw away all the old parts stock 
for older keyboards, such as these CS80 sensors. I think he mentioned 
they were a pyramid shaped rubber sensor underneath the keys.

Has anyone heard of, or experienced, this degradation in the CS80 
aftertouch sensors?

Does anyone know of a source for original or replacement CS80 
aftertouch sensors?

Is there anything that could be used as a replacement, or could 
replacements be made somehow?

Does anyone have information on how these sensors are 
constructed...materials used, shape, assembly, etc.?


Thanks,
Simon
Canberra
AUSTRALIA