The Lighthouse boxes are supposed to be aimed at a downward angle. I think that limits the ability for the Vive to track any kind of height past a certain poin

The Lighthouse boxes are supposed to be aimed at a downward angle. I think that limits the ability for the Vive to track any kind of height past a certain point. Unless they did a calibration similar to the floor calibration where you hold the controller as high as you can and it just sets that as the de-facto "ceiling", there might not really be a way to do this reliably without additional Lighthouses.