An Ayrshire-based fire engine manufacturer has joined the fight against coronavirus by working around the clock to produce free visors for NHS staff.Emergency One Group Ltd in Cumnock - in partnership with upholstery specialists Cube Services - are supporting those on the front line by using their suite of 3D Printers 24 hours a day to churn out the essential equipment.The firm - who make 250 fire engines a year - are donating every visor made by their engineers to Crosshouse Hospital.Now they are appealing to businesses, schools, colleges and individuals in the county with access to 3D printers to get involved and help ramp up production.