Hi Walter, welcome on-board! Shame I missed you too - it's funny, I assumed there'd be loads of people with REALLY big lenses, but I was the only one I could see! The 500 with a 1.4 is just a little shorter on full-frame than when mounted on a cropped (1.6) body, but we'd have had similar views. I still think it's one of the best - and most fun - lenses I've used...
Will you be trying again for Atlantis in July?
PS - we have a thread for the STS 134 mission here: