Im in the process of repainting and detailing a pair of Williams Dash 9 diesels, one power , one dummy. I am also planning to convert the powered unit to Bluetooth control. While my original plan was to paint and keep the pair the same, I got to thinking about taking one power truck and swapping to the dummy unit and just installing another Bluetooth board so I’d have two powered units. This would allow me to detail the interiors of both which is currently limited by the motor in the powered unit.
The simplicity of the Williams design really makes me want to do this. My layout in construction isn’t huge so I can’t see having more than 10-15 cars behind a single unit anyways, and if I run them as a pair I’d have the same pulling power.