How did you actually measure the cards without wrecking them? Did you pull the whole punch sheet out flat or just lay the ruler on top while they were still in the frame? I ask because I tried checking my Catan set once and the cards were so tight in there that I could not get a clean edge to line up. Also curious whether the 2mm gap showed up as a stacking problem only in certain colors, like did your wheat sit taller than the wood or was it more of a shuffle and sorting mess? The reason this matters to me is that I have a copy from a thrift store and the ore cards feel slightly slicker than the rest, which could just be wear, but now you have me wondering about the punch. Did the publisher ask for any proof besides the photo, like a receipt or the batch number off the box?