I find it really interesting that the 2nd setback occurs at the 66th floor rather than the 70th (in line with the 20 floor sections along the rest of the building).
Can anybody tell me why? Might it be an elevator issue (with transfer floor locations, etc)? Just curious.
Also, count me in the camp that would be horrified if Sears got a facade redux that didn't look exactly like it looks now (initial reaction anyway).