Quick update:
I think caz noted this a week or so ago but I will confirm. They are removing the old platforms that hung under the girders one by one. It looks like they will be relying on the blue platforms that hang on the inside of the girders for the roof rising. Even added another one yesterday.
They added an extender to the yellow crane that hangs out on Walt's old area west of the dome/stadium this morning.
Skylar is gone or almost gone now.
Almost all the activity these days appears to be happening on the floor, by cranes. It is hard to see anything of interest. Pete Sala must be a happy man.
Also, I stumbled upon this article this morning. It talks about how air supported domes came to be, why the roof cables are diagonal, and provides a lot of interesting info on stadium design.
I believe the Geiger firm that designed the new roof is headed by the same Geiger that started this whole approach.