Here is my second delivery. I designed a sort of chair which also can be produced as a bench and which can easily be produced because the section of the 3 items can be produced and the length of the furniture can be modified for each costumer.
I started with opening a new FamilyFile as an "Metric_Genetric_model" and named it "NR_MadreFamilia". This file will at the end consist the complete furniture. The three items are created each in an own FamilyFile with the typ "Metric_Genetric_Model facebased"
So I started like this: