Thanks for the comments guys.
Wayne's Chev Six Seater truck is looking brilliant and despite Waynes parts raiding comments, I did not leave with anything carrier related - one day his zombie carrier will LIVE.......
Cleaning and restoring small parts continue, this is novel for me and I'm looking forward to being able to assemble this as a big 'kit' when the hull gets sandblasted.
I pulled the Bakelite junction disc thingy out of its cover, unfortunately the steel screws had rotted and swelled, breaking the disc into many pieces. After a clean I realised that I was missing some pieces and had to sift through the rubbish to find the bits I'd inadvertatly swept up.
I still have to work out how they were sealed against the weather and make up some 0BA posts to hold the cover to the base.