Looks like a lift has been completed at the the Exchange. There is a video on Crain's Detroit showing a million pound plate being moved at once. Don't have access to the article unfortunately.
https://www.crainsdetroit.com/constr...ifted-all-once
https://www.bartonmalow.com/news-eve...ject%EF%BF%BC/
Edit:
Here we go found a video of the lift in process:
https://detroit.urbanize.city/post/l...-roof-exchange