Yes, dont ever add Bobs ores (new ores) or angels refining (removing Bob´s ore patches, making 6 new ones which you have to sort and combine to get Bob´s ores again) in the middle of a vanilla game.
Totally destroyed one of my first maps, as i foolishly saved it over the only save file i had of that base. Was my first contact with mods at all, should have tested it first

