thank you very much for sharing your work to us.
As soon as I read "2066" something deep in my mind recalled bout a similar restoration.
A good friend asked me to restore an old radio for him and to help choosing one. Finally he found a Grundig 2065 in the newspaper and asked me what I was thinking about it.
Well, I thougt, "standard radio, solid Grundig, no special or exotic and compicated feauters - that will be an easy thing". I didn't care about the "Aus"-key, that wasn't all up, I thougt it might need some oiling.
Having the chassis on my workbench I recognized, that this "Kontaktschieber", this contact-rod was broken - same way as in your radio.
Unfortunately I didn't take any pictures.
I dismantled the keyboard, by taking off al the keys and springs, so it was possible to pull out all the rods to the back (I think) of the chassis. Then I tried to fix the broken rod with different kind of glues - without success. Finally I've glued the pieces together with superglue, roughend up the surfaces with sandpaper and put some thick (2-3mm) layers of resin and glasfiber on it. By holding the damaged area into the light, the original silhouette was shining through the material and I could drill and file the hole for the keymechanism out.
The radio works without any trouble since then.
You made yourself a lot of work, pulling out the whole keymechanism, but finally you got that nice radio back to life
I really could feel the pain, watching those broken rods