Button - when I did this job, my leaf spring experiences were all with MG, so I just got on with it, trying to be logical!
The two main obstacles were first, the washers between the rear shackles and chassis mounts, which just kept dropping through.
The second was that the second spring was very difficult to align with the rear axle spigot, and the front end was much harder to force into place than the first spring.
Roger, somewhere I've seen a photograph of a long lever which attaches to the front of the spring. It's something I might do "next time". A jack handle and some U bolts might just do it.
A second pair of hands would have made that so much easier, but I didn't have that luxury.