Lindsay3a is a railcar, railmotor, doodlebug, or what ever you call it in your area of the world.
Designed to fit on a HO scale MRC F7 chassis, items like couplers, end plates/pilots and detail items need to be added by the builder.
Lindsay3a is an adaptation of the models Lindsay3 &
Lindsay2, please see Lindsay2 for more photos and details.
The main adaptaion is the creation of a flat area on the roof over the drivers cab so that a radiator of the moddlers choosing can be fitted.
Like Lindsay2 the model is optimized for printing in WSF (now know as Natural Versatile Plastic), and was designed for strength which increases the cost over that of similar sized models.