It may well be me being dense, but I'm surprised that a program developed in Hungary doesn't include the double leaf casement windows so common all over Europe. Now it may well be that few new-builds use them, but in refurb, particularly on historic properties they are still used. The ones I mean have an inner and outer leaf, a little reminiscent of secondary double glazing, but they are usually constructed as one unit. Inner windows open inwards, outer windows usually inwards but outwards in some areas. I have built one up in AC using two windows in the same place, one with casements on the outside, the other on the inside, but this is a pain. Is this a library item variant available on European editions?