Once you have the NetWalker open (like in my other post to change battery / LCD) here are some pictures of the Keyboard.
If you remove the keyboard
There are four springs that keep it floating
They will likely all pop out, I was lucky one stayed in.
They are tapered and the narrow end goes down.
The battery cover also hold down the top edge of the keyboard, so it is very likely it will come off while you are handling it.
So best to remove it and save the springs so they do not get lost!
Put the keyboard back on and then put the battery cover on right away.
The Screw plugs come in two sizes. The 2 bigger ones have a "3" in them
More as I learn...