I agree rope pulls make a big difference. I was originally inspired by MTH engines that have been adding this detail since the early 2000s. Other easily added details are class/marker lenses using flat bottom jewels, similar to the pointed ones used in non lit markers but with a flat bottom, also coupler lift bars and chains if not already equiped plus air hoses on the pilot. Then cab curtains and engine to tender deck plates. The latter requires a straight tether or wireless one.
Pete
