In preparation for the installation of a new “street design” standard, I’ve begun to link together constituent parts of buildings, and raising them up off the ground. We’re looking to establish a standardized height for a “base level” sidewalk upon which buildings will sit. The roadways will be below this level, and the satellite layer below that. Issues: sometimes, all the pieces of a building do not have the same owner. macGRID will not allow linking of objects unless they all have the same owner.