Cheers for the advice and offers of help. I am okay with ERC for certain things ( I made a whacking great 8 wheel drive vehicle with 8 wheel suspension which is in the freestuff section) but I may well need some help with the telescopics, so I'll remember you for that!

Yes, the telescoping doors didn't work in reality- the doors were lifted and held up by a crew member in the series. That is why you never see the whole open door in any shot in the series; either the front or the back of the door was being lifted up by a person!

Of course, we can fix that