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As mentioned in the previous post, as reaching the top of the dome nears, I needed to add strips of bamboo inbetween the rebar support (see photos above). At this point, I simply grabbed as much cob as I could and placed it on top of the bamboo strips and rebar then shaped accordance with the evoliving shape of the dome.
In the top photo, I'm working from the inside. If you look closely, especially to the left of me, you can see how the cob has slumped and fallen in on itself somewhat. I just have to removed the excess and place where it's needed and just keep working it until the inside surface is shaped uniformly.