This Cargo Mod is possibly one of the best mods out there for Train Fever! Great challenge! Very enjoyable puzzle to get the chain working.
Just one detail remark: the “Steel Mill” should be called “Iron Works” because it produces the iron pegs, and the name is confusing with the existing “Steel Works” which produces the actual steel. (Initially I hooked it up wrongly because of the confusing name)
Again, great mod, a must-have for all challenge seekers.