 Measurements in the fireman's cab showed temperatures could reach earning the locomotive the nickname of "The Chinese Laundry" due to the heat and humidity.During work on the crank axles at Eastleigh Works the opportunity was taken to place the locomotive on the weighbridge which showed that the offset boiler and coal bunker caused the locomotive's centre of gravity to be shifted to one side.Experiments had to be undertaken to balance the locomotive by filling the linking corridor with large quantities of scrap metal, replaced in a re-design by a raised floor, covering the weighted material.