This is one of those designs where you don't appreciate all of the engineering hurdles until you hear about the details. With the technology changing as fast as the machine is being built I'm sure there were many occasions where the original design was scrubbed to take advantage emerging technology. It never occurred to me that an LED sign may draw more current than the building is capable of providing.
One last takeaway, I didn't realize that the dot pitch changed through different parts of the sign. It's one of those very simple ideas that solves many problems at once.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.