Hi Peter,
I already tried the SAM content, but then i used the JR conc1 and reskinned it a bit because it fits better to the real Powder River basin. They use concrete track there...
About the track layout (lol), i just recreated everything i saw in video's...idk why but they have track layouts and chinks like this in the Real PRB. They have nice track layouts there...we'll probably never understand why xD
.
Felix