Thanks Winfried. The dealer kind of said the same thing. I went back there last night because I couldn't figure out the 1 mm thing and he said not to worry about that and that he never uses that measurement. He said my Brompton doesn't have the green line to see the placement through the viewing window anyway and that I should only worry about bringing the rod (denoted by the green circle in the picture below) and the adjuster (denoted by the red circle) together as much as possible. I like Winfried's suggestion about keeping the cable a bit loose. That gives me an idea of what I'm looking for. I hope I don't need to worry about the the 1 mm thing because it's still a little beyond me.