Well... tonight a thing happened. I intended to just pop into the unit and tidy up a bit, show my brother what I'd got up to with the rear end. The boot was all cleaned out and tidied up.
A view of the back of the buckets, showing how user friendly and not-sharp they are. Just the wiring and a little bit of metal tidying on the back panel to do here.
Then we sort of got talking about the suspension yet again and my brother asked why I didn't just patch it for now so we could at least move the car around. Worst case scenario is that it wouldn't work. So we repaired the broken hydragas pipe by cutting the broken ends off smooth with a pipe cutter from the pipe fixed to the car, and the spare incomplete pipe, then sleeved it with some suitable rubber hosing and four jubilee clips. THIS IS NOT A PERMANENT FIX.
Anyway, there's no photograph of that. What there is a photograph of is our offering to the patron saint of bodging, Heath Robinson. It turns out the schrader valve connector on my hydragas dalek is broken and I didn't have a replacement. What I did have is a spare air line and a tyre inflating fitting.
It was a little tricky, you have to hold the schrader fitting on at a particular angle and the trigger leaks a bit. You also have to have one of you holding the inflation fitting and the other pumping the pump. I would not recommend this method, it is appalling. The important thing is that it worked and that I'll be getting the pump refurbished so I can do it properly next time.
We took things steady, partly because we had to, partly because we didn't want to risk breaking anything. The main reason for doing things this way is to find out if the new displacer works (it does, yay!) and to make it so the car could be driven around the unit easier. We got it all up to the requisite pressure but couldn't get it to sit level, no matter how much we jiggled the car. Not wanting to risk overloading it we decided to leave it slightly wonky.
A bit disappointed, but still really happy to see the car off its bumpstops for the first time in a long while, I decided to just roll it back and forth to check it would still run and the brakes hadn't got stuck on. Then the wonkiness went away! Because of course you're supposed to do this with the handbrake off and I'd forgotten.
All level

It's good enough until I get the pipe replaced and it'll allow me to see whether or not the displacers are any good. So far, no leaks, not even on the pipe bodge. It's a big step closer to getting everything sorted.