Scrolled down and found your very informative post and it gives me a sense of relief knowing the layout surrounding Thunders family nestsite. I think you and kjrh have pretty much covered all things for Thunders first flight and eventual fledging. Here In Toronto I've been privledge in watching three juvenile siblings, soaring and hovering high above the balcony. I watch them for the longest time and seeing them up close through my binoculars can be heart-stopping, as they swoop, dive and chase each other..hawkfuntastic!!
Thunder will achieve this too!!