I'm talking about going after a previous-event building by way of the AD, that's what the thread is about, not using one in my inventory. I don't keep buildings in my inventory for the most part. If they're worth building, I make room for them. And if you have the building in your inventory, then the AD has nothing to do with it. Incidentally, I have multiple cities and about half of them are Diamond farms. However, the ones that aren't still can, and do, contribute Diamonds on occasion through Wishing Wells. And since all but one of the non-Diamond farms are below ME, the Wishing Wells provide current era goods that can't be plundered.