His typical setup is Elite Quick Motion Rollers with a power meter, so pure manual control via shifting & cadence. Not sure what resistance level setting he uses from the 3 it offers, IIRC.
Update per Jonathan:
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Elite Quick Motion Rollers: Setting 3 resistance (available settings are 1-3, with 3 being max resistance)
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Elite Nero Rollers: Resistance Mode set to 33/100