The original idea was to build a lofted dome with an outside bathroom adjoining another smaller dome. The bathroom was moved inside the dome. The loft was cut out and a sloped shingle/metal roof is being built.
Doorways have been built into the dome to allow the addition of two smaller domes. Bagged with soil/cement mix only and the doorways inside the main dome will double up as internal shelf space in the meantime. Electrics have been installed for them.
I will probably use continuous rolled bags for the additions. It may be quicker and elimate all bag closing although using Duct tape is quick enough.
There are plenty of additional construction comments in the documentation.