Dennis took a major detour when he was doing some errands to day and he did a long sweep through the HSC/CSC territory looking for either/both of the birds. They haven't been settling which might be because Joli is only 2 years old and not ready to breed yet or they just haven't settled yet. And no, they haven't settled yet. Dennis spotted both Cowboy and Joli sitting together hanging out, so they may have laid an egg, but I would have expected to see them covering (not incubating) it given the amount of rain and much cooler temperatures, but then again, she's young still and may not know better. And no, we don't know where they are nesting - where Dennis found them is just one of the places they hang out sometimes.
We've been keeping track of their time here and we do make periodic visits to the rooftops they like to visit, but no joy yet. We will keep doing this through the summer if needs be just in case. Not too late for them yet, so they still have time and we still have time to find their nest when they do.