Check out the middle of the last picture on the page. It looks like it didn't go up as far as it needed two about twice in the same line, causing a noticeable gap. Not at all trying to knock it here, amazing work for sure, just wanted to point that out. It could be intentional as well.
Most of the motion is in the up and down, which I'd guess is why you get some gaps forming between the "layers", but it still seems to be lined up OK in the angular dimension.
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Check out the middle of the last picture on the page. It looks like it didn't go up as far as it needed two about twice in the same line, causing a noticeable gap. Not at all trying to knock it here, amazing work for sure, just wanted to point that out. It could be intentional as well.
Most of the motion is in the up and down, which I'd guess is why you get some gaps forming between the "layers", but it still seems to be lined up OK in the angular dimension.