Couple of things I forgot to mention.
I recently made a hidden head unit install. Basically I HATE all head units, think they're ugly things. I've got an OEM blanking plate in the top half of the 'gap' and I've got my nice, simple Defi control unit in the bottom half.
So I removed the centre arm rest section, cut away a hole, found a shallow head unit that is used only for USB and set to work getting it to fit. I'm going to do a little more tidying up here and there to make it slightly more attractive but I'm very happy with how it works.
I've also identified another problem today. The butterfly valve actuator thing on my Y branch is basically the wrong way around, so I need to sort that on the weekend. The car has felt pretty asthmatic and I think that's the main cause, as well as a few cobwebs here and there.
First pic is how it should be, second is mine.
No idea how I didn't spot that.