Very cool, pyro. It would be interesting to measure how much vertical shrink it has after drying out. Some reports of 5-foot stacks losing 6" or so after the moisture drops so maybe that skyscraper could lose 9 inches in a few years?
Well, time will tell. That thing ain't going anywhere for a couple years. The slabs have been..um..slabbed for a year already. Cut to length this summer. That may affect shrinkage.
What really counts is how that stack will look next year and the year after. I left that second picture in the quote for one reason. Looking at the right hand side, that end looks a bit suspicious. Still, it is impressive that you did this. I do stack to 8' high but only in the barn. Outdoors, we stick to 4 1/2' high.