I ordered a replacement keybed a while ago, only because the keys from the used AK were a little yellow.
Replacement was easy. It is really easy to take the upper “body” off the synth except you have to be careful for the aftertouch connector which I believe is right underneath the pitch/mod stick. Would be a good idea to just take it off and reseat the connectors on both ends. Just lift the body up very slowly and look into it to find the small connector that has to be disconnected (and unfortunately reconnected afterwards) before you can take it off. There might be other connectors as well but I do not remember
just found this: