This looks *AMAZEBALLS*. Absolutely *AMAZEBALLS*. I'm doing this to my set for sure.
1) When you highlight the edges of the map tiles, you are going over the tile in black first, letting that dry and then hitting the edge highlight with the Uni Posca Slate Grey? Or are you trying to avoid putting black on the edges?
2) Do you have any pictures of how it looks without the Uni Posca Slate Grey?