I finally got time to clean and service the datasette this weekend.
I also tested the keyboard and loading of programs and am very pleased to say it all worked perfectly.
Phew!!!!
As always, you have all been amazing.
All that is left is to clean the chassis, really.
That being said, the text on the screen kind of shakes. Not blurred, more like it is moving a few pixels all the time.
I'll look at that next I think
Here is a video. Including the part where I found the source of the tape rattle.
https://www.youtube.com/watch?v=0y59aqTT1vA