Another MapTool user! Woot! Looks pretty good. The one thing that I would recommend is dropping the grid. As you know MT has its own grid and trying to match them up can be a pain. Other than that the only comments I have are image related.

Desaturation is your friend, and you need to do a lot of that it looks like. Also, you might actually consider doing this whole thing in MT using stamps. I would be curious how much smaller the file size would be since there are a lot of duplicated objects.