BARRE — As the owner of a mobile canning company, Mike Morin prides himself on seamlessness and tight seals. It takes precision to quickly assemble a canning line and run it without any jam-ups or spills, and as for the seams, nobody likes a leaky can of beer.One morning last week, Morin and his crew of three arrived at Stone Cow Brewery here towing a $200,000 Wild Goose canning line, smaller than what a production brewery uses, but the perfect size for his company, Black [...]