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<onlyinclude>
In 2017, the [[Sevcon]] [[Gen2/Motor Controller|controllers]] were updated ("4.5" is the unofficial revision) to support more current to the motor.
: The [[Drive Belt]] was also reinforced and widened to apply more torque through the transmission and be more robust against interference.
: Accordingly, the motor shaft is now ''splined'' instead of ''keyed'' so the motors and sprockets are not compatible across the 2016-2017 year-line.
</onlyinclude>
In 2017, the [[Sevcon]] [[Gen2/Motor Controller|controllers]] were updated ("4.5" is the unofficial revision) to support more current to the motor.
: The [[Drive Belt]] was also reinforced and widened to apply more torque through the transmission and be more robust against interference.
: Accordingly, the motor shaft is now ''splined'' instead of ''keyed'' so the motors and sprockets are not compatible across the 2016-2017 year-line.
</onlyinclude>