For the past few days I left the old S075 battery on the trickle charger and now it fully charges upto 14.10v and holding a steady 12.60v
I also tested the electrical system for any parasitic drain and it's at 30mA when parked with a brief 60mA spike once per min probably from the GPS tracker, so there's nothing unusual that could drain the battery.
Maybe the extended battery connections in the engine bay are rusty and need some cleaning.
The battery cells may have also calcified slightly back in summer 2020 lockdown when I was slowly rebuilding the sills & windscreen for weeks and the battery drained below 12v?
Drove the peugeot to work for the past snowy week to keep salty snow away from kassandra but now that it's stopped, I can drive her again with a new battery.
machined this rear window washer for feeding the new LED brake light wiring through
The peugeots old rear caliper has been seized for awhile now with a weak handbrake.
Even though I brought a spare caliper weeks ago, this damn brake nut was really stuck and rounded off my brake nut spanner, stopping progress before the snow came.
So this week before the rain comes, I put a small tack weld on the nut to stop the spanner spinning
It worked, the nut loosened off the caliper but was still really fused onto the brake line so I simply spun the whole caliper off without damaging the brake line
Now I can swap all the good bits over to the spare caliper such as the rubber piston boot and bleed screw
The new caliper handbrake lever works much better
Fitted and working but the handbrake cable still sticks slightly so it doesn't fully release
Adding a tension spring to pull it back helps the handbrake release fully now

It's satisfying to have a fully working handbrake that doesn't bind anymore