I stopped by the site early this afternoon and saw Mark working up on the second floor. He didn't see me, and it was loud with the generator going, so he couldn't hear me, either. I didn't want to surprise him while he was precariously perched on top of the ladder hanging over the edge of the roof, so after a while I just went home. But I could see that he'd installed more of the sag straps, including some on the roof. More tomorrow after we talk to him to see what he's been up to.