I may try to post some better images of Thomas' gear box, but to sum it up, it's got more weights in the rear behind the motor, witch is the only thing that blocks shel swapping with other Thomases
The switch is different and the direction is sellected by a contact change when the switch, that has some contacts moves across the circuit board
The switch is different and the direction is sellected by a contact change when the switch, that has some contacts moves across the circuit board
The magic of the GWR
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