I actually currently live in Darke county as well lol. I am working on a 4x right now too. RCS version though, not sure, due to my pc not being the highest end thing in the world. Not real sure how well it would handle the row crop visuals.
I can definitely understand the PC issue, I just had to upgrade mine to handle 16x maps along with RCS. What part of Darke are you in? I live about 10 minutes south of Greenville! Really cool to see someone making sick mods that is from the same place as me!