What interested me was in the section sample developments, there was an item about fouseasons sunrooms (I assume this is a N American Co. selling bolt on sunrooms/ conservatories). There was -again I assume an API-? which helps designers/ sales people form GDL Sunrooms, it looked very interesting does anybody know if this "add on" is availiable to archicad users, Is it the same as Archiglazing? I havent really seen what Archiglazing is capable of.