As the manuals say, re-assembly in reverse order, which was a doodle with exception of inserting the leaf springs (a highlight, every time again) and I also struggled to re-install the speedometer cable! Somehow the rubber plug in the spindle didn't allow to feed the cable deep enough, then it didn't move at all. A lot of pulling and swearing resulted in this:
The first ~15 cm outer "skin" ripped off! Using it in this condition would result in almost instant death of the cable. Well, I always have a lot of spares in my garage, but a speedo cable isn't something you expect to need now and then. So I had to fix it. Luckily I have several rolls of heat shring tubing material in different diameters available, why not give it a try with this. It should seal in both directions, no water can ingress and no grease can egress.
Here is the cure for the cable:
In the background you can see the remains of the rubber plug. This is something I had in my spare parts stash:
The rest was done real quick, the beam got another coat of wax from the outside, then I just checked if all screws were properly fixed, the grease nipples were used to press out any old grease and a final visual check if everything looked good.
On the bright side, none of the involved tools will catch any rust soon, as this was a messy, greasy affair!