Unfortunately I must say that the baloon made of gips was not a good idea, it is now breaking into pieces.
Next time I will try it with a styropor ball.
My current project is a Zeppelin bought recently at the SPIEL in Essen from Labmasu (a new Italian company, they will also be at Crisis in Antwerp next Saturday). They have very nice VSF stuff, but the assembly of the Zeppelin needs a lote of patience and is not really easy. Parts are not always fitting as they should.