Now comes the interesting part. I have never in all these years seen a weaver build like this. Normally they demolish the whole nest and start a new one somewhere else. He seems to be a lazy builder and knows what he's doing though.
I love the timing of your photos it caught his wings in this house spread fashion. Maybe he’s setting a train for a new type of construction! Or maybe he is capitalizing on the previous foundation to make the new construction easier.