Jim
I cannot answer the which powertrain question due to little knowledge but can answer the wire problem.
In the early days of brushless controllers they needed a sensor in the motod to relate therotor position for motor control hence the 5 wires.
With the later controllers these are not required this data is picked up by the micro from I believethe current waveform.
You can run the motors on a modern controller no prob (I do an Aveoxon a Jeti controller) just ignore the sensor wires and tie them neatly in the nose area.
Regards
Dave (uk)
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