Step 4: Done.....

The SP1 project is now nearly finished. After many tedious hours of cleaning I finally get around to replacing the rubber feet. This is pretty straightforward: Pull the old feet out, grind the new ones to size and put them in.
The rubber feet came from the supplies of Bob Aubert.

The Keyboard presented a bit of a problem. You can not take it apart to replace keys. But I found out that the keytops can be snapped on to and off their stems. (I also discovered they break easily...)

Those that I couldn't replace I painted. I lightly sanded the keytops with a 1200 emery paper to remove discolorations and spilled paint. They came out quite nicely (left). Now only some SP2 keys that were mounted on this machine at some point still need to be replaced.

Here's the machine in its current condition, seen from the left.....

and from the right....

and the front.