So, I recently discovered this Civ 4 and this mod which is an amazing reproduction and improvement on my favorite game from my childhood. But one thing has continued to elude me, which is the Customs House. I have built a Customs House in each of my 4 cities but all 4 cities are always overflowing on my goods. I tried setting one city to all "0's" another city to all "999's", but no matter what I do, I cannot get the Customs House to work like it did in the original Colonization. Am I missing something? Is there a way to get the Customs House to sell all of my non-essentials goods like the original?