Over the weekend, managed to solder wire ends and insert them into fuse panel. Bit more tidying still to come....and haven't started under the bonnet yet!
I had the sub box insert panel covered in vinyl (same as seats etc) by the upholsterer....then filled around the edges to make it a flush fit.
After some more fine filler and high build primer, not to mention more sanding....base and clear coat will go on. Should be a nice contrast with the vinyl.