We finished building the large column walls, and moved back to the other 6 walls. We changed our plans a bit, due to the return aid ducts that we are placing in the walls. We now have 3 different types of wall elements, return air walls, standard walls, and beam support walls. The return air walls won't look different once we are done, but we have to construct them differently due to needing to remove the plywood later from them. It's better for us to change it all now, then to do in on site.