I used to do Roof art as well back in the day all the cities I was the guy that did all the Mystic Tree guys and sooo many more lol but the trouble is now I can't remember what settings I used for the Mosaic Creator program I had and found from my old hard drives there are settings to have it fit to the squares for the roof I would so Truly want to get back into it again. How much do you charge for a size 11 lot ?