you need at least one of every part of the book, param train is to be used just to be easy copy pasted around, depot is the main stop of every train, easy bugfixing is because i dont know what i am doing so i need it in case more trains than needed start, loader is for loading with ores from mines or whatever you need, unloader is the stop to unload not perfectly with belts. works with the power of radars. red wire items you have and green wire items needed.