Heavily modified to make this European computer work with North American standards.
Here you can see where chips were replaced with sockets. Also other changes. I don't understand why the keyboard connector was changed.
Motherboard in place.
Here's the reworking of the Z80 area.
The MMU changes.
This is the video changes, to make it work with North American standards. I think this machine was a sample European 128D used to see what it would take to make a North American model.