After eight hours of loud drilling yesterday on Cooperstown’s Glen Avenue, Titan Drilling of Arkville handed out gift certificates to neighbors today as a good will gesture. At Glen and Railroad, Linda Parmalee, who was concerned yesterday about what turned out to the foundation of a novel Geothermal Heating System, said neighbors would have appreciated being briefed about what was going on. “We don’t want to prevent people from doing their jobs,” she said.