A little progress today:
The first two doors arrived. Those go into the control room, opposite of each other. They will be the natural light source for the control room.
We also cut the hole for the door to what will be the lounge (storage at this time)
We put in the cross bracing, glued to the OSB and nailed to the stud frame. Now every "panel" resonates at a different frequency.
... and I installed patio doors. Still have to put insulation in the gaps and fill them with silicone.
Tomorrow I have to
uninstall 
the Sonys at the old studio, if I have time, because the SSL is arriving on Wednesday
I want to set everything up in the old place, do a mix on it and make sure I'm not missing anything. Also a good time to figure out the patchbay needs.