I think they're just a
bit high, Mike--going from the mechanical level of 50 Fremont at ~200', I'd say you've made the thousand-footer 1100' or so.
Still: awesome. I can't wait. I have to admit that ever since these were announced, whenever I'm at a vantage point where I think they might be visible, I take a few seconds to try to visualize them.
A vantage point like, say, my roof: