It will be neat to find out, its not often that we have reports of birds that were formerly nesting on structures to move to cliff ledges. And even rarer is having a cam on a nest on a cliff-ledge.
The Alma pair has moved back and forth between the nest box and the cliff since 2007. Last year, they raised four chicks in the nest box. In 2007, they checked out the nest box for a while, but moved to the cliff. This was their first year nesting on the cliff, and they raised four chicks there, all female. They were: K/60, Zephyr; K/61, Chinook; K/62, Mistral; and K/63, Diabla. One of the chicks, Zephyr (K/60), was found in August 2007 with a wing injury.
This year, they spent time at the nest box initially (I posted pics of a territorial dispute there), but they decided to move back to the cliff, known as 12-Mile Bluff.