Update time!
I needed to remove the stock seats from the car today to get a measure up for fitting the new ones, as I was unsure if the OEM rails would either fit the Cobra seats or whether I'd need to come up with a creative plan. There's also the minor issue of removing the little humps of metal which are spot-welded to the floor pan and need to come off if you want to get the seat really low (which I do), and then I'll need to drill the floor pan itself and bolt through.
I decided to take out the quite pretty and in very good nick chrome roll hoop structure thing, and whilst I was removing things I decided to remove the stereo as it's pointless keeping it in there so I set about dismantling the centre console which can be done in 7 screws and 3 mins, I kid you not. Stereo came out easy enough, but then I thought that with the bare aerial lead in there floating around I might get some weird noises from the speakers, so they should probably come out as well. And then there's the door cards themselves... I ended up with this little lot ready to go into the shed, it's all utterly mint:
I assume there's no issue with running without door cards? Just got the plastic sheeting there covering the central locking (which I managed to fix on the driver side, yay!) and the electric window motor. Doesn't look pretty but it's lighter! Would any of this cause an MOT failure? I don't think so, but it's only 10 mins to put the cards back on.
It feels a little bit more like my car now, and so in good fashion I just had to put some stickers on it, which will give a hint as to the secondary colour that I'm going to use for some cheap-ass viper stripes...
Just waiting on the sticker company to get back to me, and then it'll be pink vinyl all the way baby!