The keyboard is otherwise near mint. In fact, I knew the owner of the store where it was purchased, and - being aware of subtle differences in keybed feel - was allowed to "try before I buy". This one had the best action by far. Still does.
It makes a great controller - with aftertouch - for my K1r. But not enough at this point to justify hanging on to it. I have a feeling it's destined for eBay as a "Parts, not working" auction. Or back to Three Wave, as they offered to buy it for parts.
If you ever find a solution, don't hesitate to post! Thanks!