Maybe the burros were only used to transport the MXSG concentrates to the southwest to the gulf of California, and the plan is actually to use ships to travel south along the Gulf to the pacific and then swing north along the USA coastline, thru the Bering Strait and take the Northwest Passage to Hudson’s Bay, travel south by canoe , portaging where necessary, til they hit Lake Superior and then transfer to a steamship and head south to Lake Huron, then west to Lake Michigan, and finally south to the port of chicago, where the cargo can be transported the last leg to the refinery by bicycle messenger or hot dog vendor.