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Friends and customers shared memories with Sean Bracken, who is shuttering his garage at Greenbridge Gas & Auto this week after 12 years of service. The Dublin native said the stresses of owning a business, and the commute, convinced him to move on.    David Briggs

The steel workbench in the back of Bracken Auto Services is splattered in dark grease stains from past automotive projects, but on Tuesday a new oily substance joined the mix: juices from rock cod and beef kabobs. Over a dozen friends and close customers gathered for a barbecue to celebrate Sean Bracken, owner of the auto repair shop, on . . .