 We have a general idea of how long the lab demos will take. Some of that is TBD as we're kind of working through the OTA process and determining a final amount of vendors. But generally, each vendor is going to have a window of time to come in and demonstrate what they can do. And then we'll schedule that individually with each vendor. And we don't know how many vendors we're going to end up with. So that's why the window is a little bit difficult. But we think between