So, here is the angle drive:
One problem in getting it off is that the knurled/threaded sleeve connector on the speedo cable is so thin, if you grip it with any force then it distorts a little and wont turn.
Anyway, as you can see I have pulled some wires out of the angle driver. What are they doing in there? I was expecting to see a square metal boss: but all I see is these wires.
The thing is almost certainly kaput. I need a replacement!
(By the way, what is the small screw for on the side of the angle drive?)
In better news, I finished replacing the rear brake lines, left and right, and the small flexible hose. That went quite well.
The screws that hold the brake drum on to the hub on the passenger side are seized. They are posidrive/Philips, and the holes are burred, so I can't apply much turning force without burring them more :-(
I think I need an impact screwdriver: would that help?