I have just had a word with Mr Kranz who was not able to give me any more detail on the U2 other than that it is absolutely true to scale, all glass and the dimensions as given earlier, He cannot speak any English and does not have any brochures etc.
He is not going to the Expo in Stuttgart either (too busy). It must be a good product if he does not have to advertise, has no internet site and is not going to the expo, good models seem to sell themselves. I will put a note in the German forum and see what happens.

regards

Daniel