(LINK HERE in case the image doesn't work)
I altered the settings so I can have an unlimited supply from very small deposits (similar to the infinite resource mod). Little did I know it would be so hard to find some damn copper.
After spending 2 hours driving around in my car in the land to the south, west and north of my base (in that order), locating various Iron deposits, as well as a few coal and oil deposits, I still could not find any copper.
I eventually did find one at point A, after building a 25-length land bridge to get to the east side of this giant lake. Shortly after I found deposit B too, which was hidden under 3 biter bases.
Unfortunately each of these deposits can only take 4 miners on them at a time, and I have to continue scouting for more.
The distance via rail (thanks to the updated ghost-rail laying system) is 1051 rail pieces to get back to where I am currently standing.