My replacement front uprights have just been delivered, shiny objects of desire they are too, with no visible cracks and nice chunky mounting points for the callipers. I shall feel much more confident with these than I ever would have with the old ones.
A quick visit to the bathroom scales shows them to weigh 2Kg each, it will be interesting to see how much more or less they weigh than the old ones.
So fitting coolant pipes, adjusting the handbrake and replacing the front uprights would seem to be the plan for tomorrow.