I have spent the last few weeks working on the interior and the roof...

The interior was built a plastic false floor. Compartments were likewise built of plastic, and the seats were built of balsa.

The roof was built on a flase ceiling. Two thick pieces of styrene strip (2mm square) were run down the length of this as a pair of keels, and then the roof itself is a sheet of paper pulled taut and fixed with UHU. On the corners I need to break out the filler and sort out the little gaps, and I think it needs cutting back a little. Then I need to sort out the roof vents...