More done!
Been spending the snowy weather (in between sledging on our far hill with the rest of the village, 3 landrovers and a quad

) in my shed working on the rear calipers!
Old PSU in the shed turns out to be a dud, so will drop by the local pc parts shop tomorrow when I'm in town, see if they've got an old one for beer money. Will then look at putting some form of cage together.
I have noticed a lot of silt in the bottom of the bucket. Is this just old rust or is it soda crystals that need stirring back up?
Now have both calipers electrolysiesedsded (or something like that), one is waiting for brushing off and stripping and the other has been stripped, cleaned, painted and put back together with new seals and oil.
Haven't touched the handbrake maechanism as it looks like an absolute sh1t to deal with

. Also had real problems putting the final dust protector in place

after the piston was in place. Gonna try a different order on the nect caliper; put the dust in place and then slide the piston through it.
Piccies to follow!