Retired now, Das remembers his days spent with the Darjeeling Himalayan Railway in Darjeeling with fondness. "Sometimes the staff would come up to me claiming a certain problem with the engine could not be solved. "'Hundaina, sir (not possible, sir),' they would tell me," he recollects. "I would tell them 'there is nothing called impossible; just tell me what you need to correct the problem. We have the Tin Dharia workshop supporting us. If it can't be done, it can be renovated and brought in two days later."