I have a D70 with the very common perishing glue syndrome.
Basically the epoxy used to glue in the key weights perishes under certain circumstances over time. The result is dripping glue from under the keys and weights falling out, rendering the keys useless.
I've heard of repairing this by pulling the synth apart, removing the weights, and re-gluing them with fresh epoxy.
Has anyone done this? I've tried Googling to no avail.
I didn't find the right solution from the Internet.